During a school trip to Hamburg's Falkenberg, children discover the brutally mutilated body of an old man. A wound on the corpse suggests a far-right background. However, detectives Stella Brandes and Banu Kurtoglu have their doubts. They keep encountering the legends surrounding Klaus Störtebeker, who is said to have buried his treasure at Falkenberg. Or does the tragic fate of a young girl from a bygone era provide the crucial clue that leads to the perpetrator?.