Homicide detective Leigh Abbott has something to prove, both to herself and to the men in her department. She's been assigned a difficult challenge: solve a murder where the only evidence is a single bone. To identify the victim and find the killer, she must join forces with forensic anthropologist Matt Lowell. Matt's initial refusal is only the first in a series of setbacks. Matt and Leigh's skills and tenuous partnership are tested when the evidence leads them to a burial ground of unidentified victims, where, to their horror, they stumble upon a freshly ravaged corpse. Before long, the serial killer raises the stakes and Matt and Leigh find themselves marked as targets. Now they must stop the killer before they become the next victims.