Rei has a startling premonition while studying with the studying with the s at the shrine. The world is coming to and end! Meanwhile, Professor Tomoe, an evil genius, has presented the Sailor Soldiers with a new threat. He's created monsters that can steal people's pure hearts! He won't stop until he finds the three pure heart crystals, which contain the talismans that can bring forth the Holy Grail. And on top of that, two mysterious warriors appear and are after the pure heart talismans as well! The sailor soldiers fight bravely against this new threat, but what's this? They almost lost! This could mean trouble for the Sailor Soldiers.

Usagi has a nightmare about the light of the Silver Crystal fading and wakes up only to find that it's not a dream! Mamo-chan tries to cheer her up by taking her to an abandoned church where all the stray cats of the neighborhood live. Usagi makes friends with a young girl who has been taking care of the cats. But the little girl's been targeted by a Daimohn named Nekonnell! Usagi tries to help, but she can't transform. When all hope seems lost, Usagi's useless broach suddenly transforms into an even more powerful transformation. With her power restored, Usagi transforms, defeating Nekonnell with an all new attack! Only seconds before, the two mysterious warriors appeared yet again, but left after they found that the little girls heart did not contain a talisman. Unfortunately, this is only the beginning for the Sailor Soldiers.

Usagi and Minako meet a young boy and a young lady, and fall for the boy...deciding to follow him around. They are caught by surprise when a daimon appears, and they must fight it...when the help of the mysterious warriors Neptune and Uranus. Later, Usagi and Minako meet the boy finally, and learn that it is a masculine woman.