A brother, Earland Josephson, returns to his family home to visit his sister in the Italian countryside. He brings with him his young male lover. In the house with the sister are two women, one of whom, Mariangela Melato, takes care of the farm. The two women are friends and lovers since childhood and one senses that Melato's relationship is shadowed by the relationship she had with her mother shown through wonderful flashbacks. The brother also has wonderful memories of his and his sister's childhood in that same house with their father who was a magician. Following a night out at a lovely restaurant in the woods, other memories of the past are aroused in the Brother. The next day they all plan to drive to Venice where his sister sang opera in her youth for a holiday. Fate intervenes.
Juan Carlos Naya stars as teenaged Danny, whose summer vacation with three friends and some nudists from Norway turns into a real mess as sexual rivalries and jealousy escalate into Lilli Carati's attempted suicide.
A man tries to uncover an unconventional psychologist's therapy techniques on his institutionalized wife, while a series of brutal attacks committed by a brood of mutant children coincides with the husband's investigation.