When a wealthy couple are taken hostage, Luther must try to avert a disastrous chain of events. However, what he doesn't know is that it will soon become very personal.

Luther, suspected of murder, goes on the run to try and prove his innocence. With Alice's assistance, they set out together to exact revenge on the real killer.

Still plagued by the death of his ex-wife, Luther returns to work to face a surreal and nightmarish case of a masked murderer determined to enter into folklore. As the body count rises, Luther must use all his skills to stop the killer, at the same time trying to rescue an old acquaintance's daughter from the dangerous world of prostitution.

Luther must rescue Ripley, abducted by Cameron, in time to prevent Cameron's final murderous set piece. But Jenny's ruthless and vengeful boss is demanding compensation for stealing her protege. Luther is torn; will his visionary mind provide the team with the tools to save Ripley and the killer's intended victims, or will his focus be compromised?