In their castle, a wealthy couple (Frank Wolff and Erika Remberg) watch a blue 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.
It received critical praise upon its release by many critics, especially Andy Warhol and Vincent Canby as being one of the first films with graphic sex to have Hollywood like production values. However, Roger Ebert found the film to be pretentious and the plot, convoluted.