Summer. Late 1970s. Small provincial town. Twelve-year-old Piotrek lives with his mother; there is a very strong bond between them. While his father is away, Piotrek's mother starts going out almost every night. Instantly their simple and clear relationship starts to get complicated. Entangled in the affairs of the adult world, Piotrek feels lost and lonely. Spending time with his peers brings first fascinations and disappointments. Upon his father's return, Piotrek must confront him with uncomfortable truth. Will he support his mother? Will he be loyal towards his father? How his painful and difficult experience will influence his relationship with his mother?