Four friends gather at a villa with the intention of eating themselves to death.
Alphonse Tram is unwittingly involved in several murders despite having no memory of committing the crimes. His confusion lead him to confess to his neighbour, Inspector Morvandieu. Alphonse and Morvandieu become the axis around which murders occur.
After learning of her husband's infidelities, a housewife invites an itinerant lesbian to move in with them. None of their lives will ever be the same again.
