East Frisian coast: A ghost ship on the North Sea, a yacht with a dead man and a survivor on board who doesn't say a word: A mysterious case for Femke Folkmer and Tjark Wolf. The dead man was a banker and involved in dubious business dealings around an offshore wind farm. The survivor from the yacht was apparently a prostitute and thus just a random victim. However, when a fatal attack is carried out on her shortly afterwards, the detectives realize that they have become embroiled in a deadly web of intrigue, power and betrayal, in which they themselves are in mortal danger...