The fifteen year-old Maria "Mimmina" Luiza leaves the boarding school in Genève to stay in the Bechten Hotel nursing her father, the widower writer Guido, who is paralyzed by rheumatism. Along the days, Guido recovers from his illness and Mimmina has a crush on him and tries to seduce her own father. When her roommate and best friend Therese, who is eight years older than Mimmina, comes to the hotel to visit Mimmina, she has a love affair with Guido with tragic consequences.