A tricky out-of-area mission for Peter Lohmeyer alias Chief Inspector Jan Fabel in his fourth case in the hustle and bustle of Cologne Carnival, of all things, the introverted hamburger has to chase a serial killer and stop a colleague from going it alone. Lisa Maria Potthoff plays the policewoman Maria, whose traumatic experience turns into a blind thirst for vengeance, Stipe Erceg can be seen in the role of the burned-out top chef and Murathan Muslu as a macho criminal. The lost souls are what make this bestseller film adaptation by the author Craig Russell, which is extremely exciting right up to the last second.