As firefighters attempt to get a major fire at a Birmingham factory under control, fire investigator Luke Beckett is deployed to investigate before vital evidence is destroyed by the blaze. With no natural sources of ignition, Luke thinks that the fire may have been started deliberately, and a police investigation is launched. Although no forensic leads are found in the wreckage, in a stroke of luck, the factory’s CCTV room is left intact after the fire. Luke and the police have to work together to investigate whether this was a deliberate act, a reckless act of arson or something else altogether.