Assassins are after a prostitute who has come into possession of a cigarette lighter that, unbeknownst to her, contains the negatives that show a politician's assassination. A delightfully playful giallo starring the beautiful Carole Bouquet as Mystère, a high class call girl who becomes the target for a couple of assassins.

A young woman trapped in a web of dark family secrets finds herself in a dangerous triangle of love, jealousy, and deception, where the truth hides in her past.