There is something horribly wrong with the bodies found in the dark city streets. Some are mutilated while others have the Price equation (wΔz = Cov (w,z) = βwzVz) carved into their flesh. Detective Eddie Argo and his new partner Helen Westcott unearth the meaning of the odd equation and realise each victim is being offered a gruesome choice: kill your loved ones, or be killed. Before long it becomes clear that the perpetrator has suffered a similar fate and is now coping by seeking a way to solve this philosophical dilemma.
Alex Berger, a respected teacher, is shaken when a student he once slept with is found murdered by a lakeside in his small Brandenburg town, prompting police to order mass DNA testing. As detectives close in, Alex confesses the affair to his wife but insists he’s innocent of the murder, while the strain threatens to tear his family apart.
Ever since his wife Paula left him, Felix Keller has been holed up in his apartment, and it is only right that the residents avoid him. But then a leaking water pipe, which turns his apartment into a damp biotope, forces him to make contact with the outside world. The water damage was caused by Marie in the apartment above him. Of all things, Felix is partly to blame for a car accident in which her daughter Amelie broke her leg
