Sweden's most notorious serial killer, Jurek Walter, was shot and killed years ago. The police moved on and managed to forget the darkness that had tainted their lives. Has come back from the dead. But now someone is leaving a trail of broken bodies across Sweden and the clues all point to Walter. Detective Joona Linna is convinced his worst nightmare is becoming a reality: the man who tore apart his family has returned to finish the job. He doesn't just kill you. He buries your loved ones alive. When Joona's partner is taken - and locked inside an underground coffin - he finds himself with an impossible choice: leave her to die or walk into the trap set by the only man he ever feared.