As a child, living on his families country estate, Thom is discovered by his sister when he spied on her making love with the family chauffeur. His sister seduces him arid this begins their long and incestuous relationship until she is killed in a tragic auto accident.

One day many years later, he sees a photo of a popular model called Kate, in a magazine. He is shocked by the uncanny resemblance she bears to his late sister.

Thom arranges for their paths to cross and after she realizes how wealthy he is consents to become his mistress. For the first time in many years Thom is at peace with himself But, this is only a temporary lull in the storm. The obsession to return to the Carnal Games of his childhood gnaws away at him, and Kate must be his playmate. They begin by sharing their erotic games with the guests and family friends at their mansion. Soon, Thom is encouraging Kate to sleep with strangers they pick up off the street, just so he can watch them.

As each affair becomes more sordid, Kate is torn between desire and repulsion. When Thom's unrelenting demands reach an intolerable state, she chooses to leave him for another man, who loves her in a less demanding way.

Thom learns of her plan to run away with someone else, and in a rage decides to murder them. Just as they leave, he jumps into his car and chases after them. Trying to drive them off the road he looses control of his car and plummets down the side of the mortuary exploding in a ball of flames, as the picture ends.