When a series of seemingly indiscriminate killings become ever more audacious Luther and new recruit DS Catherine Halliday are confounded by a tangle of leads and misdirection that appears designed to protect an untouchable corruption.

Luther must confront a demon from his past, as the police and Cornelius converge on his home. Halliday is convinced the body in the morgue isn't that of the killer.

Luther's left reeling by tragic events but must race to save the others from a killer determined to complete his macabre masterpiece. Can the troubled DCI come to terms with the problems that threaten his career, life and those around him?