Scenes of crime don't usually conceal deranged women who've appeared as if from nowhere, but when Boston crime scene investigator Darby McCormick is called in to investigate the abduction of a teenage couple from their home, she finds just that. A woman, dangerously underfed and distressed, hiding beneath the porch. They mystery woman was abducted from the area five years earlier and it seems somehow she's managed to escape from the dungeon where she was being held...
The case brings unsettling memories for Darby, whose childhood friends were abducted fifteen years ago -- one of them never to be seen again -- and it seems there might be disturbing similarities between the two cases. The clock is ticking and Darby is determined to find the location of the dungeon, where the teenage couple is being held. But when the FBI becomes involved in the investigation, it seems there's rather more at stake with a rash of disappearances and murders pointing towards a serial killer who's been on the prowl for decades...
