20 volunteers agree to take part in a seemingly well-paid experiment advertised by the university. It is supposed to be about aggressive behavior in an artificial prison situation. A journalist senses a story behind the ad and smuggles himself in among the test subjects. They are randomly divided into prisoners and guards. What seems like a game at the beginning soon turns into bloody seriousness.

A calm, balanced subway driver witnesses a woman throwing herself in front of his train. The memory of the event haunts him. The film depicts the effects of the trauma on the man, his psyche, his family and friends, and his own life. An intense drama about confronting death and questioning the meaning of life.