The new series focuses on Bancroft's continuing success following her promotion to Detective Chief Superintendent. She's popular with her colleagues, and her crime figures are down. However, her success comes at a price, as she's lonely and estranged from her beloved son Joe and under pressure as a result of her dangerous pact with crime boss Daanish Kamara.When Joe is inadvertently dragged into the middle of a double murder case, Bancroft determines to do anything to protect her son and finds herself up against a chilling new antagonist.