When Sarah Kelly disappears after a night out in Helmsdale, Detective Inspector Mike Nash is convinced that something far more sinister than a simple missing-person case has occurred. With no body and little evidence, he begins searching for connections to other young women who vanished under similarly mysterious circumstances years earlier.
At the same time, Nash must investigate the brutal murder of Lizzie Barton, while another local man is attacked and possible suspects begin to emerge. His investigation gradually uncovers a disturbing pattern involving vulnerable young women, carefully planned abductions and a predator who has remained hidden for years.
As Nash and his CID team follow increasingly dangerous leads, the case becomes deeply personal. A shadowy suspect is watching those closest to Nash, while Sarah's fate remains uncertain.
With time running out, Nash must uncover the truth before another woman disappears—and before the killer realizes how close the police are.