Pasák holek (1930)

During a steamboat disaster on the Vltava, rower Chrapot saves one of the passengers, Duschnitz, from drowning and takes him home. Chrapot's wife nurses Duschnitz back to health, but he then seduces her. From this relationship with the Chrapots, a son Jarda is born. He becomes a tramp. He has affairs with promiscuous girls and works briefly as a waiter in a bar. With Betka's help, he set up a nightclub. However, he is found by the police and imprisoned. Betka's sister Luisa loves Jarda, but after the death of her grandmother, she finds herself in a difficult situation and looks for a job with Agent Busch, who earns his living in the same way as Jarda. When Jarda learns after his release from prison that Busch wants to send Luisa to Bucharest, he thwarts her plans. He reconciles with his hated father-in-law and marries Luisa so they can start a new life together.