Guarda su Altadefinizione. The relationship between lovers Yves and Claude comes to an abrupt conclusion when, as the couple are making love, Yves slices Claude's throat, killing him. After being taken into custody for his crime, the police inspector demands to know the reason behind Yves' actions. Yves then weaves the tale of his life with Claude, explaining the origins of their relationship and how it reached a point where murder was the only possible conclusion.