Christian Kempenich, a pedantic law firm manager, attends a christening in Cologne, leading to a boozy night. He wakes up in a stranger’s bed and is accused of stealing bed linen from the hotel. Meanwhile, his wife Hedwig had her own fling and wants to keep it secret. When she learns of Christian’s predicament, she reveals her affair during a heated discussion. Realising their marriage is at risk, they decide to work on their relationship.