On a leave of absence from the police force, Luther is laying low in a rundown cottage on the edge of England but a visit from his old colleagues at the Met brings a shocking piece of e edge of England but a visit from his old colleagues at the Met brings a shocking piece of news that draws him back to London in search of the truth. Meanwhile, a gruesome serial killer has struck the city. With a trail of clues leading from one crime scene to the next, Schenk and his t...