Jirka Hudecek (Alexei Okunev) wins a car race and receives congratulations from his friends. Here the dream ends, and the young man realizes that he is facing a court trial together with other members of his gang of thieves. Jirka is the only one to be put on probation; the others - including Rosmery (Marta Raslová), Jirka's secret love - go to jail. Jirka's parents have never taken much care of him. His father (Josef Langmiler) slaps him in the face on leaving the court hall, but Jirka immediately hits back. The young man starts to work in a quarry, keeping to dream about a car racing career. He irritates his co-workers by his rebellious views, cynicism, and even by his long hair.