December 31, 1999. While everyone on TV is waiting for the Y2K bug, Christine is getting ready to celebrate the new millennium with a group of friends and her lover, Mina. But the couple must first make a detour to Christine's parents' vacation home, an opportunity for them to finally meet their daughter-in-law. The current seems to pass surprisingly well, but the young woman begins to find the behavior of her parents more and more strange... Time advances and the aperitif turns into dinner, and as the fateful hour approaches, she understands that they have walked straight into a trap.