Hoping to surprise his sons, Ethan Brand, the chief of police of a small town in northern Washington state, is contemplating buying a horse. But when the horse literally stumbles upon an abandoned smuggling tunnel, Ethan and his lead investigator Brenda Lee Page discover a dead body connected to a decade-old mystery.

Ten years ago, Tyler Rash, a troubled friend of Ethan's, vanished without a trace. The body in the tunnel has Tyler's ID and personal effects.

As Ethan and Brenda Lee investigate Tyler's disappearance, they follow a trail that leads them to a cross-border smuggling operation connected to the town's notorious family of smugglers. And when a bomb is sent to Ethan's own house, the case takes a deadly and personal turn. A killer is stalking Ethan Brand-a killer he'll have to face if he wants to see his family again.