With his friend in peril and a young woman kidnapped by the relentless serial killer, can Luther protect the innocent while preventing Cornelius' violent revenge from consuming him? Who is Luther willing to save, and who can't he bear to lose?

A gruesome serial killer terrorizing London while the brilliant but disgraced detective John Luther sits behind bars. Haunted by his failure to capture the cyber psychopath who now taunts him, Luther decides to break out of prison to finish the job by any means necessary.