In their castle, a wealthy couple (Frank Wolff (actor) and Erika Remberg) watch an erotic movie with their adult son, played by Paolo Turco. Later that evening, at a local carnival, they spot a woman (Silvana Venturelli) who appears to be one of the performers in the film, and decide to take her home with them. Although a subsequent viewing of the film calls the woman's identity into question, their house guest quickly succeeds in seducing the various members of the family, resulting in the revelation of certain facts, fears and desires.