AllMovie

A middle-aged woman fears that her husband is cheating on her -- and chooses a very unlikely method for verifying her paranoia -- in this psychological drama from the writer of Une Liaison Pornographique. Catherine (Fanny Ardant) is a successful Parisian gynecologist whose long-term marriage to Bernard (Gérard Depardieu) has been passionless as of late. When she checks his cell phone messages one afternoon, she discovers a suggestive "thank you" from a young colleague of his, which creates an even wider chasm between the two. Desperate, Catherine goes to an upscale strip club nearby to solicit the services of Nathalie (Emmanuelle Béart), a matter-of-fact prostitute. It seems Catherine wants Nathalie to seduce Bernard and report back to her each week, an assignment that's initially off-putting to the young woman, but one she begins to relish as the weeks pass. Soon, Nathalie is using intimate details to fuel Catherine's rage toward her husband. Nathalie... had its gala North American premiere at the 2003 Toronto Film Festival.