Sheridan Smith stars in this ITV crime drama. Leeds PC Jo Gillespie (Smith) is devastated when her husband, undercover officer Ryan (Kenny Doughty), is found dead in an abandoned warehouse. Although she is advised to leave the investigation to her colleagues, Jo is determined to find the killer herself with the help of friend DC Jack Clark (Matthew McNulty). After the chief suspect is taken into custody Jo remains defiant that the case should not be closed and her intuition proves correct when another body is found, proving her husband's killer is still at large. As she battles to find the elusive criminal and keep her family together in the wake of the tragedy Jo also begins to question her loyalty to the force.