On a beach in Nice, François meets the mysterious Peggy and falls in love with her. Following her to a villa, he meets Marc, a lawyer who has a strange relationship with the girl. Marc tells François that Peggy is a drug addict: she kills men who approach her.
A young man comes back to his provincial home town to visit his dying uncle (blacklisted American actor Lionel Stander). His uncle is being attended to by a night nurse and novice nun (Gloria Guida in a nun's habit).