Earthquakes occur in various parts of Japan. It was nothing but a harbinger of the revival of the Great Kingdom, which once ruled ancient Japan. Queen Himika woke up from a long sleep. Shiba Hiroshi, a car racer who survived a major accident, is killed by his father who knows Himika's ambitions. However, his father became a machine father and revealed the existence of the Steel Jeeg.

Hiroshi during Jeeg's combined training was suffering because he couldn't grasp the timing well. He gets tired of it and give up, but the Haniwa phantom of the Great Kingdom kidnaps Mayumi and presses to exchange it for the dotaku once excavated by Dr. Shiba. While destroying the motorcycle, Hiroshi is heading to rescue Mayumi. There is no one other than Steel Jeeg who can save her captive!

Queen Himika's anger had reached its peak due to repeated defeats. This time, she plans to eliminate Jeeg and use a boy to get the location of the build base. However, Uzuki, who caught the mysterious radio wave, detected an abnormality. A phantom fortress Yamata no Orochi appears in front of her who is heading for the boy's protection, and even Haniwa phantom people aiming for the power plant appear.

A Self-Defense Force plane caused an unexplained crash. Hiroshi brings back fragments of a huge Buddha statue found near the scene and discovers that it is part of the Haniwa Phantom. On the other hand, Himika attacked the complex. Hiroshi tries to face it, but it is prevented from going to the flames emitted by the Buddha statue that revealed its identity. Moreover, Yamata no Orochi is approaching from the sea.

Himika plotted to eliminate Jeeg by using a magnetic storm caused by sunspot abnormalities. If you seal the magnetic power, Hiroshi can't even become Jeeg. At that time, Don, a black eagle who calls himself a rival in the air, was building Mechadon using scrap. When a Haniwa Phantom appear, Mechadon starts to play a big role instead of Jeeg.

Hiroshi reunites with his senior racer Hoshikawa in a race with a prize of 5 million yen. Hoshikawa, who is known for his careful driving, is somehow aiming for the championship on this day. He wants to win the prize for his girl named Chie who can't walk. When the race entered its peak, Haniwa phantom appeared on the course...

Hiroshi is ordered to investigate the radioactive contamination spreading in Yoshida Bay, but he refuses to go out saying that the chores are not his job. Uzuki, who had no choice but to visit the site alone, found a mysterious rock that is the source of pollution. As soon as she approached to collect it, she fell ill exposed to radiation. Hiroshi was forced to fight the Haniwa phantom Tsubute who appeared in front of the Big Shooter.

Hiroshi, who appeared on TV, said that he Don is not a rival worth it. Don is furious and wants a motorcycle duel. He, who really doesn't want to lose, used cowardly means. Hiroshi fell down, hit his head and temporarily loose his sight. While he's unable to fight, Haniwa phantom Droma appeared. Don, who felt responsible, confronts Droma alone.

Without the Big Shooter, Hiroshi can't become a Jeeg ... Himika orders Amasso and Ikima to conduct a joint operation and make Haniwa phantom Kiira attack Shaboten Park. Kira disappeared once and reappeared. Uzuki tried to launch the Big Shooter, but outside the base, Yamata no Orochi was waiting.

Himika made the executive Mima set a terrible trap for defeating Jeeg. Mayumi, who longed for the snow princess, was lured out by the sound of the whistle blowing by Haniwa phantom flickering, and took her away as a hostage. However, Chirara, who doesn't like conflict, tries to escape Mayumi and fails, and is transformed into a terrible figure by Himika.

The Build Base location has been discovered by Himika. Hiroshi, tired of repeated interventions, is irritated by Uzuki, and the ship on which Don and the others are on is swallowed by the vortex that suddenly occurred. Hiroshi that went to help encountered a mysterious object at the bottom of the lake. Suddenly, he wonder if he really belongs to humans.

Does he really has an immortal body? In order to find the answer to the question, Hiroshi dared to fall for the strategy of inviting Haniwa Phantom Goula. The purpose of Amasso, who manipulates Gowler, is to capture Hiroshi and attack the Build Base in the absence of Jeeg. As he expected, the poorly defended Build Base will be in trouble.

Yamata no Orochi attacked a passenger plane and took Dr. Bose, who was on board, to the Great Kingdom. The doctor was supposed to be the chairman of the World Peace Conference to be held in Tokyo. Himika planned to declare herself as the conqueror of modern Japan through the doctor's mouth. The doctor becomes an intermediary himself and tries to find a way to peace...

Hiroshi learned that he was a cyborg. Shocked, he became desperate and lost his will to fight. Even if a phantom fortress appears, Uzuki is forced to face it with the Big Shooter. Don and Pancho fought hard in Mechadon to help Hiroshi captured by the Haniwa phantom Barabba. With the hard work of his friends, Hiroshi finds the meaning of fighting.

Don and Pancho were working hard to make Mechadon have flying capabilities. However, it is worthless efforts and failures. Don gets angry and finally fired Pancho. On the other hand, Himika sent Haniwa phantom Loisa and injured Uzuki seriously. Pancho, who likes Uzuki, vows to avenge her with Mechadon.

Hiroshi, who accepted to be a cyborg, has still a wounded heart and has nightmares every night. If you're not human, are you just a machine to fight? Suffering creates confusion, and the Haniwa phantom Dyra who appeared forced him to struggle. It was the wish and courage of a boy to save his hometown that gave him fighting spirit again.

Don and Pancho decided to ask Dr. Dairi to build Mechadon 2 in order to win against Jeeg. Dr. Okura appears, and asserts that Mechadon 2 needs an energy amplification device. Don and Pancho took his words seriously and removed the amplification device from the Big Shooter.

In order to protect the machine father from attack, the development of a spontaneous transportation device was underway on the Build Base. However, the Haniwa phantom Nume released by Himika had already started to invade the Build Base. No attack can be used against a slime like Amoeba. Yamata no Orochi appears in front of Hiroshi without him being able to do anything.

Queen Himika revived General Takeru, who was once said to be the bravest in the Great Kingdom. The general's request to sleep peacefully beside his late wife was not heard, he's turned into a Haniwa phantom and asked to attack the Build Base. However, as soon as he saw Uzuki, who went out with the Big Shooter, he stopped attacking for some reason.

A Haniwa Phantom appears in front of Mayumi who was playing in the park. Her best friend Toko's pet was seriously injured. Mayumi always believed that Jeeg would come to help, but the steel giant did not appear until the end, and she suffered a deep wound in her heart. Mayumi was piling up the image of her father to the strong and reliable Jeeg...

Himika has started a strategy to defeat Jeeg with her own hands. She's going to use Haniwa phantom Razitsu to lure him into the volcano where an abnormal magnetic reaction is occurring. Hiroshi, on Dr. Shiba's instructions, who sensed the abnormality, escaped the difficulty, but this time he is required to come to the volcano mouth with the passengers of the passenger plane as hostage. Carrying the prayer of the hostage's son, Hiroshi goes to the volcanic island where Razitsu is waiting!

Suspicious tornadoes occur in Ise Bay, causing damage to ships sailing in the vicinity one after another. Uzuki, who went to investigate with the Big Shooter, loses consciousness after being attacked by the Haniwa phantom Gilara who was lurking in a tornado. Hiroshi that went to the rescue was also caught by Yamata no Orochi, who was waiting for him. Gilara's magic hand approaching the Build Base. Mechadon is the only one they can rely on.

Mimashi occupied Mayumi's ferry, and Mayumi and the others were trapped in the hold. Mimashi threatens to blow up the ferry with all the passengers if Hiroshi doesn't hand over the dotaku within an hour.

An incident occurred where people suddenly became violent without warning. It is reported that the poison that flowed out of the Build Base is the cause, and angry citizens are rushing in. Hiroshi, who went to investigate, was suspicious that only the trees facing the south side of the site were withering, and found out that it was Haniwa phantom Dogera who was dripping poison.

Hiroshi, who participated in the rally, is eager to dedicate victory to his mother Kikue's birthday, but is attacked by Haniwa phantom Daima who suddenly appeared. When he was upset by the neural circuit, it was as if a person had changed. When he escapes while being manipulated by Himika's telekinesis, he approaches the machine father to take his mother hostage and tell him where the dotaku is.

When Chibi learned that the Shiba family was in difficulty, he left the house because he couldn't cause trouble. Knowing that, Hiroshi desperately starts looking for Chibi, but is seriously injured by the arrow of Haniwa phantom Garros, who was ambushed. On the other hand, Himika is angry when she learns that he is alive and sends Garros again to take his life at all costs.

Hiroshi, who devoted himself to special training by his father's order, fell beyond the limits of his mind and body. The hospital he was taken was occupied by Ikima on Himika's order. Hiroshi was given numbness medicine and fell into a predicament, but he succeeded in escaping with the help of Uzuki who rushed to it. While fighting against Ikima and Mimashi, he will make a new transformation while being guided by his father's voice!

Himika finally found out the hiding place of the dotaku. Hiroshi proposed not to wait for the opponent's attack, but to attack the great kingdom instead. However, Dr. Shiba dismissed it because of the opponent's strength. Hiroshi that can't give up goes out with the Big Shooter without listening to orders and goes to Kyushu, the place where the dotaku was found.

With the development of new weapons, Jeeg succeeded in powering up. Finally, he decide to get into the Great Kingdom, which is the home of Himika. Before the battle for the future of Japan, the Build Base members are united for victory. However, Himika was using her telekinesis to solve the mystery of the dotaku. A new enemy appears from the entrance of the sealed dragon gate.

Uzuki, who was given a kimono as a gift from Kikue, remembered her mother who left her when she was young. She went to the amusement park and was captured by Haniwa phantom Modoki. Modoki disguises exactly like Miwa and trick Jeeg. Hiroshi goes out after receiving the news of the enemy's attack without knowing anything.

Unexplained accidents were happening in various parts of Japan. Mayumi's bus was also involved in an accident, and Toko was seriously injured. It seems to be the work of the great kingdom. Hiroshi rush to the scene after learning about the accident of a passenger plane that occurred over Mt. Fuji. Bardo, a robot beast hiding underground, attacked and destroyed the Mach drill.

Mechadon, who went to investigate Yamakawa Dam, found Yamata no Orochi. Hiroshi will face General Flora, who has been fighting with the robot beast Doran, using the new weapon marine parts. At that time, Mimashi was revealing the truth of Himika's death to Ikima and Amasso. The Haniwa army took advantage of Flora's absence and rebelled against the Dragon Demon Emperor and forced him to abdicate!

Amasso and Ikima, who were imprisoned for treason, escape from prison to ask for forgiveness by defeating Jeeg. They planted a bomb in Hiroshi's car that participated in the race, disguised as Don and Pancho and rampaged with Mechadon. The bomb will explode if the car fall below 80 km/h, so it must removed while driving. Even the robot beast and the hijacked Mechadon appeared...

Dr. Shiba devised new measures for the increasingly fierce battle. However, Hiroshi is careless because of the increase in Jeeg's strength. As if poking there, Flora sent a robot beast Gokira to the special steel factory. If the reactor is destroyed, it will be a big deal. Jeeg struggles, and Dr. Shiba activates the evacuation capsule.

Flora made the robot soldiers attack Hiroshi's family to block Jeeg's movement. Director Dairi thought about the future and proposed to evacuate Hiroshi's family to the Build Base. Hiroshi refused because he was afraid that his family would get involved, so he couldn't sortie even if the enemy appeared. His mother preaches to him the real role of his family and admonishes him to fulfill his mission.

The phenomenon of flowers dying in cold air continues. Hiroshi, who met Hiromi, a girl with leukaemia, knows that the only remaining black rose is her support to live, and promises to protect the flower. Flora uses it and stands in front of Hiroshi heading to the hospital. In the middle of a one-on-one battle, Hiroshi unexpectedly learned about Flora's sad past...

When Hiroshi heard Flora's call, he asked Uzuki to launch the Big Shooter to the underground kingdom to have a discussion. However, there was a trap of the Dragon Demon Emperor on the way. Ikima, the robot beast Dodon approaches Hiroshi trapped in the volcano by Amasso's ploy. Flora suffers between fear of the emperor and conscience...

Amasso returned a boy's fossil to a human form with magical power. He sent him to the museum where the mammoth fossils, he once had as good friend, is enshrined. The boy shoots fire arrows and the mammoth fossil becomes a Haniwa phantom mammo who starts a rampage. People panic and run away. Hiroshi is hesitant to fight against the boy who is not originally an enemy.

While piloting the Big Shooter, Uzuki's physical condition changes. Kikue invites Uzuki, who is on leave, to go shopping and buys a dress at a department store as a present. The department store was attacked by the robot beast Dorila. The two evacuated but are surrounded by robot soldiers led by Flora. Although she manages to repel it, Uzuki falls down again.

A duel is held in the underground kingdom, the robot beast brothers Reds and Blacks were chosen as Jeeg's assassins. On the other hand, on the ground, Mayumi's puppy had disappeared. Mayumi gets acute pneumonia because she searched around in the rain. Hiroshi entrust a pendant to Mayumi, who suffers from nightmares due to high fever, and Hiroshi challenges the robot beast brothers to a fight!

While Hiroshi is enjoying a brief holiday, the invasion plan was steadily progressing in the underground kingdom. Ikima succeeded in summoning Himika's soul. Himika's soul transfers to the robot beast Raygon and drags Jeeg into a different dimension graveyard. The Haniwa phantoms who once destroyed attack Jeeg, who was deprived of his power by spiritual power!

A huge meteorite fell to the ground. Hiroshi and Uzuki, who went on reconnaissance, witness the appearance of the robot beast Jan from the meteorite. Jeeg, who was lured by Jan, is wrapped in pieces of magnetic rocks and transported to the space where the Phantom Fortress is waiting. The Dragon Demon Emperor, who is convinced of victory, takes the command of Jan himself and embarks on the capture of the Build Base.

Hiroshi, who was invited to a flying hotel, was caught in Flora's trap and took a paralyzing medicine. Flora tries to blow up Hiroshi, but when she is told that the Dragon Demon Emperor is not a benefactor but an enemy who slaughtered his parents and brothers, she help Hiroshi escape from the phantom fortress. Flora, who broke up with the Dragon Demon Emperor, remains in the fortress and tries to atone for her crimes.

The Dragon Demon Emperor, who lost General Flora, raised the four strongest kings of Haniwa Phantom to a blood festival and went to the front on the Dragon Demon Ship. Before the approaching decisive battle, Hiroshi says goodbye to Mayumi, her mother and Dr. Shiba sends him out with the mysterious words "die and live". Hiroshi dominate the air battle but ends up being hurt by the dragon demon emperor's sword and falls down.

The Dragon Demon Emperor has gathered all Haniwa soldiers and robot soldiers and launched an all-out attack on the Build Base. The Dragon Demon Emperor demands the abandonment of the Build Base, but Dr. Shiba resolutely refuses it. Dr. Shiba goes out with a capsule and rush into the phantom fortress. Now, Hiroshi, who inherited his father's will, is embarking on the last battle with the Dragon Demon Emperor!

Himika, the queen of the Great Kingdom, who had been sleeping for a long time, was revived. Dr. Shiba, who was expecting it, created Steel Jeeg. Hiroshi, which was turned into a cyborg by Dr. Shiba, transforms into Steel Jeeg and defeats Himika by joining forces with his partners Uzuki, Build Base, and Mechadon. Hiroshi will risk everything when an even more ferious enemy appear, the Dragon Demon Emperor.