
A biographical film about a Czech doctor, Dr. Jánský. The athletically inclined medic Jánský successfully completes his studies. He wants to become a surgeon, but finds himself in Professor Kuffner's psychiatric clinic, where, together with his colleague Kozdera, he tries to uncover the connection between blood clotting and mental illness. They make the surprising discovery that human blood can be divided into four groups and thus prevent it from clotting during transfusions. However, Jánský's discovery is met with misunderstanding by the Czech medical community...
Dr. Jan Janský

Prof. Kuffner

Hedva

Dr. Kozdera

Dr. Regent

Kurzweil

Papik

Kolcava

Kolcavova

Prof. Kyselka

Kyselkova

Dr. Pluhar

Guardian

Injured Soldier

Kolonka

Injured Comrade

Jansky's Nurse (1921)
Doctor at Lecture

Unknown Role

Lékar na prednásce

Professor

Unknown Role
Stana Jansky, as an adult
Unknown Role
Doctor at Lecture

Soldier with Stomach Wound
Dr. Horak
Secret Police Agent

Secret Police Agent
Commissar
Secretary

Clinic Porter
Prísedící
Nurse
Young Woman
Public Health Nurse
Unknown Role
Patient

Unknown Role
Unknown Role
Unknown Role
Aggressive Psychiatric Patient

Unknown Role

Unknown Role
Doctor at Lecture
Unknown Role

Unknown Role
