Following eleven years' absence away from the force, DS Marcella Backland is drawn back to police work following the return of the Grove Park Killer, her last case before she left. She is driven by the news that her previous lead suspect, Peter Cullen, is out of prison for manslaughter and who is now working in a bakery on a prison placement scheme.
Former detective Marcella Backland is devastated when her husband leaves her and their two children. He is a legal adviser to DTG construction, property developers, effectively controlled by the Gibson family. When she is visited by a senior detective on the murder squad for information regarding an unsolved serial killer 11 years previously who seems to have become active again, Marcella returns to the murder squad. She enters a world of on-line dating, prostitution, and dubious dealings of her husband's employers while trying to save her marriage.
Marcella - Series 1, Episode 1 Synopsis and Schedule