During a party somewhere in Paris, an apprentice filmmaker, Boris, and a young executive, Marilyne, play at being a loving couple when they’ve only just met. They end up really falling in love. Five years later ... Marilyne, accompanied by Boris and their two kids, goes to Ibiza on a business trip. Just as Boris, tired of being a househusband, is about to leave her, Marilyne takes off on a lover’s spree. Five years later...