Haunted by his failure to capture Robey before his imprisonment, Luther orchestrates a daring prison break to stop the killer by any means necessary. He eventually teams up with his former nemesis-turned-superior, Odette Raine, to track Robey to an icy, remote location for a final showdown.

: The film explores modern anxieties surrounding digital privacy and the dark web, as Robey operates a "Red Room" where viewers pay to watch torture.

The film picks up after the events of the series finale, with John Luther incarcerated for his history of vigilantism and law-breaking. While he is behind bars, a wealthy cyber-psychopath named David Robey (Andy Serkis) begins terrorizing London. Robey uses a vast network of hackers to monitor citizens through webcams and smart devices, blackmailing victims into committing horrific acts or facing public exposure.

: The film reteamed series creator Neil Cross with director Jamie Payne, who previously directed the series' fifth season.

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