The senior residence is located right by the dyke and would be the ideal place for a peaceful retirement, if not for the fact that one resident after another is meeting their end in an unusual way. At first, Chief Inspector Christoph Johannes and his colleagues Grosse Jäger and Mommsen struggle to provide evidence that crimes are occurring here. However, once the North Frisians are immersed in the world of the elderly, they are confronted with even more mysterious events behind the dyke. The team from the Husum criminal police is once again busy and investigates as usual with heart, intellect, and a good dose of North German humor.