For a detective and an FBI agent, two seemingly disparate murder investigations collide with a twist in an explosive novel of suspense by a Wall Street Journal bestselling author.

In the crisp mountain air of central Oregon, a teenage girl's search for discarded cans leads to a horrifying discovery: a body, brutally murdered and abandoned in the woods. The case falls to Deschutes County Detective Noelle Marshall, who finds herself navigating a community steeped in secrets, suspicion, and distrust of outsiders--especially law enforcement.

Miles away, FBI Special Agent Max Rhodes investigates a different kind of darkness--chatter about a violent uprising from a shadowy militia group preparing for war. The two cases seem worlds apart. But as Noelle digs into the murdered man's past and Max closes in on the source of the terror plot, their paths begin to converge in a terrifying way. This was no random killing. It was a message. A merciless killer and a hidden army are operating in the same shadows, and finding the link between them is the only thing standing between a single murder and a full-blown massacre.