After de-bunking her philandering spouse's deceptions, Jodie Colter accidentally stumbles onto the murder case of a former homecoming queen. She quickly finds that her natural snooping skills, honed on catching her cheating husband, can be put to even better use by bringing a killer to justice. With her children in tow, she pieces together the clues that prove the homecoming queen's canny lawyer husband is a murderer.

Jenny, a single mother raising two daughters after her husband leaves, is aided by her widowed mother, Mary. But Jenny struggles to stay afloat after Mary suffers a devastating stroke and develops dementia.

Based on a true story, this four-part drama tells the story of the murder of 11-year-old Rhys Jones in Croxteth, Liverpool, in 2007. It explores Melanie’s and Steve’s ordeal, and tells of how Rhys’ murderer and associates were eventually brought to justice.

Unforgotten has been recommissioned for a seventh series following the success of series six.