A skinhead attack on a Turkish schoolboy links four protagonists: Dannaks, promoted to Oberkommissar, leaves Drugs to join Soko REX, a small unit that deals with racism and extremism. The unit is often seconded to assist Homicide, most recently because a serial killer is on the loose in Hamburg hanging right-wingers. But helping Homicide takes a backseat as Dannaks comes terms with his new duties and gets embroiled in a private police-corruption investigation...