Louis, a rich man who lives quietly in
St Tropez with his beautiful young wife Julie, has cardiac and alcohol problems. They sleep in separate rooms and, when she meets Jeff, a writer, she starts an affair with him. The two decide that she will knock the sleeping Louis unconscious and that Jeff, after dumping the body off a boat, will lie low in Italy. To her dismay, Jeff disappears and, with him, all of Louis' money: she is left without husband, lover, or assets and under police surveillance as a suspect. Then Louis reappears, apparently fit and alcohol-free: he says he knocked Jeff unconscious and took him to the boat where, after extracting a written confession, he killed him. Claiming that he now wants to be a good husband to Julie, they make love for the first time in years and forgive each other. Then Jeff reappears, with a gun, saying that on the boat Louis could not face killing him. He now wants Julie and the money, but Julie refuses and Louis has a fatal heart attack. As Jeff starts raping Julie, police appear and arrest him. ==Principal cast==