9-year-old Mücke's life is in danger, and Ingo Lenßen encounters his toughest case yet. For the boy is not only the son of his good friend and former investigator Tekin Kurtulus. Mücke is also Lenßen's godson. As Lenßen stands helplessly, watching destiny taking its course, he realizes that there are abysses in his environment which he and his loved ones must finally face.