The smug TV star Tim Seebach is the celebrated inspector "Der Lux" in a popular television series, whose success has gone to his head. In real murder cases in his hometown of Bremerhaven, he likes to intervene without being asked in the investigations of Chief Inspector Wiebke Tönnessen, much to her chagrin. The restaurant owner Hannah Lübker rounds off the trio of investigators, who understands the prominent weekend returnee better than he would like.