15-year-old Maria "Mimmina" leaves the boarding school in Genève to stay in the Bechten Hotel nursing her widower father, international journalist Guido, who is paralyzed by rheumatism. They haven't seen each other for several years. For some reason she is doing everything in her power to get him to have sex with her. She even brings herself to orgasm while next to him in bed. He nearly goes apoplectic trying to avoid her advances. Eventually, her school chum Therese who is 8 years her senior comes to visit, and at last Guido has a semi-suitable object for his seriously-overheated passions. Therese and Guido have a love affair with tragic consequences.