Sylvie Cloutier, art lover and former antiques dealer, is trapped in her loveless marriage to the bullying Henri like a bird in a gilded cage. Meanwhile, security guard, hopeless romantic and bookworm Philippe Moreau cycles through the streets of Paris in his crumpled uniform, late (again) for his night shift at the Louvre.

When Sylvie begs her husband to let her go to work, he gets her a job as an evening cleaner at the Louvre, thinking such a menial position will dispel any ideas about independence she might have. But his plan backfires when she falls in love with kind, gentle Philippe. They decide to run away together, but there's a major problem: neither of them has any money. One stormy night in the Louvre, the answer to their prayers falls into their lap. But is it really the solution - or another even bigger problem?