Paul, a former womanizer, marries the head of the medical department's "unattractive" daughter Christine because he thinks attractive women can't be trusted and make poor wives. A car accident leaves him bedridden and he begins to miss his playboy days, when Christine's bombshell sister Martine arrives and Paul decides he must have her. He begins drugging Christine at night so he can sneak out to kill of Martine's many suitors one by one.

Jean-Paul Belmondo
as Le docteur Paul Simay

Mia Farrow
as Christine Dupont

Laura Antonelli
as Martine Dupont

Marlène Appelt
as L'Infirmière Carole

Dominique Zardi
as L'évêque

Daniel Lecourtois
as Le professeur Dupont

Daniel Ivernel
as Le docteur Berthier

Patrick Préjean
as Arthur Ringard

Michel Peyrelon
as Joseph Melville

Henri Attal
as 'La sourde'