Marie (Emmanuelle Béart) is the object of affection for clock repair man Julien (Jerzy Radziwilowicz), who bides his time between his business, romancing Marie, and blackmailing the mysterious Madame X (Anne Brochet). Rivette unravels some sensual scenes between the two lovers, with Marie quickly moving in with Julien as their relationship flourishes. But problems are afoot, as Julien starts to notice something distinctly strange about his new love, and fears she is harboring a terrible secret. To prise the truth out of her, he turns to Madame X for help, who seems to be the only person who can help him with his quandary.