The late 1970s. Summer in a small provincial town. Twelve-year-old Piotrek has a very strong bond with his mother. While his father is away, his mother starts going out almost every night. Their simple and clear relationship starts to get complicated. Entangled in the affairs of adults, Piotrek feels lost and lonely. Spending time with his peers brings his first fascinations and disappointments. Upon his father's return, Piotrek must confront the uncomfortable truth. Will he support his mother? Will he be loyal towards his father? How will his painful and difficult experience influence his relationship with his mother?