When primary school teacher Gemma goes missing in Manchester, surveillance officers Martin and Stella are tasked with observing the prime suspect, Gemma’s boyfriend Greg Sullivan.

Martin goes on a mission to dig deeper into Carl Tuckman's murky past, hoping to find clues that may relate to Gemma's disappearance. Crime drama, starring Noel Clarke, Bronagh Waugh and Alexandra Roach.

Martin witnesses Greg coming to pieces in front of his eyes. But is this a guilty man trying to hide his secrets or a grieving partner on a mission to find Gemma?

A birthday lunch held in Gemma's honour leads to secrets being exposed, and a break for Martin comes from an unexpected source, as his illicit bond with Zoe deepens. DCs Martin Young and Stella Beckett put the prime suspect under surveillance when a primary school teacher goes missing in Manchester.

Martin prepares Carl to confront Kate in the hopes of a confession, but the surveillance operation takes an unexpected turn, leading to devastating consequences. Manchester primary school teacher Gemma Hillman goes missing and DCs Martin Young and Stella Beckett are given the task of putting her boyfriend - the prime suspect - under surveillance.