During a cold winter night in Stockholm, a man is found walking alongside a railway bridge suffering from hypothermia and legionella. After he's rushed to the hospital, it's discovered that, according to his death certificate, the man has been dead for over seven years. He is believed to be a victim of the notorious serial killer Jurek Walter. As DI Joona Linna investigates where the "dead man" has been all these years, some unexpected evidence leads to the reopening of a cold case.