Waking up on the island beach - idyllic? It actually is, on Langeoog. But waking up with blood on your hands, not knowing who you are, where you come from, and what you have done? That looks bad. What to do? Search. For your own name, a few dry clothes, something to eat, and for the suitcase - because there must be a suitcase somewhere, in a room that you must have booked. And while one person searches for themselves, the choir director misses his young soloist, Ulfert Janssen, Aunt Lütis' will, and Stahnke, well - Chief Inspector Stahnke is looking for his swimming trunks.