In the Black Moor near Hanover, hunters make a terrible discovery: in the midst of the gloomy landscape lies the brutally mutilated body of a man. The deceased had his heart ripped from his body. Commissioner Bodo Völxen soon finds himself at his limits during the investigation. The initial clues lead to a group of animal rights activists, which includes his daughter Wanda. Can he investigate against his own daughter? And why is the widow of the deceased so reserved in her statements?.