The wild sex of the neighbouring couple makes the pictures on Thomas and Anna's walls shake and hits their relationship, which has been deadlocked for 20 years, to the core. Tired and irritated, they argue even more than usual. There were times when they could hardly keep their hands off each other. When Anna invites the neighbours to an aperitif and they make them a surprisingly generous offer, events come to a head: The night becomes a moment of truth.