A brutal killer terrorizes a city as they carve odd shapes into their victim's torso.

Ellie meets Detective Harkins, an old friend of FBI Agent Watkins, at a crime scene involving blood spatter, Ellie's specialty. While Digger visits with Ellie, they put their weekend plans on hold as another bloody scene waits for Ellie's observation. Digger tags along as a courtesy but finds himself in the middle of his own investigation involving bone recovery and identification.

That's when the two cases collide. Can Digger and Ellie save their relationship when Ellie's old flame joins the hunt?

As the team works tirelessly to identify the killer, it proves difficult as the murders continue, and the killer sets his sights on those trying to end his melee.

Can Digger, Ellie, and the team survive the attempt on their lives, or will the killer complete his picture with their bodies?