Netflix (which is making the film alongside the BBC) has revealed the logline, explaining that it will be "an epic continuation of the Luther saga". It continues by explaining the film will kick off where the TV series was left. It reads, "a gruesome serial killer is terrorizing London while 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."