A successful fifty-year-old entrepreneur, Tullio Conforti, opposed to divorce for religious reasons, is in fact separated from his wife and leads a frenetic life divided between numerous lovers.

Young nobleman Mino lives with his mother and Marta, the housekeeper, in an old, decaying castle. He is infantile and morbidly attached to the weird duo; his only hobby is taxidermy. Laura, Mino's fiancee, is met with jealousy and hatred by the two women, and decides to leave the castle; but Marta sabotages her car brakes and she is killed. Mino takes her body back to the castle. Meanwhile, his mother is violently arguing with Marta, who throws her down the stairs and repeatedly bashes her head on the floor. The distraught Mino descends into madness: he picks up a stripper at a nightclub and brings her home, then strangles her while having sex next to Laura's dead body. He does the same with a prostitute. Marta discovers these murders and offers to help dispose of bodies. A year later, Daniela (Laura's twin sister) arrives at the castle...

In the village of Rockspring, the election of "little sheriff" is taking place, whereby a child is chosen to assist the local sheriff for a week. When a young girl is kidnapped, the sheriff sets off to rescue her, and the children organize their own search party to free their friend.

Thirty Italian singers from the sixties sing their hits.