An experimental satirical comedy maintained in a grotesque tone: the film's action consists of improvised mini-scenes recorded in a mockumentary style, set among passengers aboard a ship sailing on the Vistula River. On board, a stowaway (Stanisław Tym) is mistaken by the captain (Ryszard Pietruski) for a cultural and educational instructor. He organizes meetings, elections for a cruise council, and eventually, games and celebrations for the captain's birthday.