In one of the small port towns, a boy named Vasya lives in a basement with his drunkard father and sister Ganusya. After a disagreement, his drunken friends kill his father. Ganusya is sent to a children's colony. Vasya joins a group of homeless people. One day, the leader of the homeless, Koska, and his friend, nicknamed Sailor, detain a girl, Alya, the daughter of the seaman Chugunov, on the street to get a ransom for her. But while Koska and Sailor negotiate with the father for a ransom, Vasya, who was assigned to watch over Alya, releases the girl and takes her to her father himself. The verdict of the homeless is unequivocal: this is treason.