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.

Cast: Noel Clarke, Alexandra Roach, Amy Wren, Kíla Lord Cassidy, Lucy Chambers, Catherine Tyldesley, Phill Langhorne, Fehinti Balogun, Sarah Niles, Marcus Garvey, Bronagh Waugh, Phil Davis, Dominic Allburn, Hubert Hanowicz, Karen Henthorn