When arrested and interrogated by DI Kate Warren, Alan Lane vehemently protests his innocence and insists he never killed his wife Imogen, but when Jack and Nikki fail to get concrete evidence in time to charge him, Lane walks free. However, when the team finally unearth the shocking truth about Imogen's murder, it exposes a web of lies and deceit which puts those connected to the case in imminent danger from the sinister Alan Lane. As their fears about the ex-cop intensify, Nikki and Jack must swerve the sceptical police and piece together their evidence to build a water-tight case against Lane fast, in order to prevent more innocent lives being lost.