For Detective Matt Buchanan, the world is a pretty sick place. He has probably been in the job too long, for one thing. And then there’s 14-year-old Samantha Coates, and the other unsolved murder cases. Those innocent girls he just can’t get out of his head. When Buchanan pursues some fresh leads, it soon becomes clear he’s on the trail of something big. As he pieces the horrific crimes together, Buchanan finds the very foundations of everything he once believed in start to crumble. He’s forced across that grey line that separates right and wrong – into places so dark, even he might not make it back.