Leeds police constable Jo Gillespie is devastated when her husband| undercover officer Ryan| is killed in suspicious circumstances. As she battles to stay strong forthe benefit of daughter Melly and stepson Hal| Jo is urged by her bosses| DCI Will Hepburn and Chief Constable Carolyn Jarecki| to leave it to her fellow officers tofind the killer. But when the murder inquiry starts to uncover some dangerous secrets about Ryan| Jo's faith in the police family of which she has been a part for solong is severely tested. No longer sure who to trust| Jo embarks on her own investigation with the help of friend and colleague Jack Clark| but as they close in onthe identity of Ryan's killer| Jo's hunt for the truth will put her own life in danger.