A new East Frisian crime novel by BILD bestseller author Dirk Trost. The fourth case for Jan de Fries. The moment the signal rocket explodes with a sharp bang and the fog bank is bathed in red light, former lawyer Jan de Fries knows that something is terribly wrong. Two tethered fishing boats drift like ghost ships on the sea. When Jan boards with his friends Uz and Onno, he is met in the cabin with a scene of horror: the two crews of the fishing boats had apparently gathered for a birthday celebration at sea, but now they are all dead. But who fired the rocket just a few minutes earlier? It quickly becomes clear that the sailors did not die a natural death, and Jan is right in the middle of a new investigation. The next day, during his morning run along the dike, Jan and his dog Motte fall victim to a targeted attack.