Creed's scent dog, Grace, discovers a shallow grave hidden deep in an isolated part of Florida's Blackwater River State Forest.

Discovering the remains of a young woman in a highway ditch, FBI special agent Maggie O'Dell and her partner, Tully, embark on a frantic cross-country effort to capture a serial killer who is targeting truckers and travelers at rest stops.

Fifteen years ago Ryder Creed's sister, Brodie disappeared from an interstate rest stop. She was only eleven and Creed was fourteen. Since then her disappearance has haunted him, so much so that Creed has dedicated his life to his K9 business. He rescues abandoned dogs and trains them for scent detection. Together they search for the lost and missing. A thousand miles away during a police raid, FBI special agent Maggie O'Dell stumbles upon a clue...

Ryder Creed rescues abandoned dogs and turns them into heroes. But this time, it's Creed who may need rescuing when a madman leads him and Agent Maggie O'Dell on a gut-wrenching scavenger hunt.