The erotic tale of a young millionaire (Jean-Paul Belmondo) and his mail-order fiancee (Catherine Deneuve) on the tropical Isle de Reunion. Tobacco tycoon Louis Mahe (Belmondo) is completely enraptured by Julie Rouselle (Deneuve) and when she disappears without a trace he will stop at nothing to find her. This decision eventually entangles him in a relentless obsession which ends in cold blooded murder.