A WOUNDED DAUGHTER. Detective Fabian Risk's daughter is in a coma at Helsingborg hospital. It's Risk's fault for getting her involved in his last investigation - and the guilt is crippling. A MURDERED BOY. A young Syrian refugee has been killed. It looks like a racist attack - but then more people die across Sweden and Denmark. There's no link between any of the victims. Is this a serial killer who strikes at random? A DESPERATE HUNT. In Denmark, Police Chief Astrid Tuvesson must abandon her AA program to lead the investigation. And in Sweden, Fabian Risk is called from his daughter's bedside and forced back into service. But even with a united team, tracking a random killer is next to impossible... HOW DO YOU CATCH A KILLER... WHO NEVER STRIKES THE SAME WAY TWICE?