Walt Hamblin is an easy going modern cowboy that works for the Libby, Montana Sheriff's Office. On his days off he enjoys horseback riding in the mountains and on this particular trip he stumbles onto a dead body lying on top of Henry's Peak. Finding himself at a loss as to how the body got there, Walt calls Josh Simms, a rookie detective he is training, to help process the scene. Unable to find the identity of the John Doe, Walt is ready to file the case as unsolved. Trying one last option, he sends the information to the FBI's crime lab in Quantico, Virginia. Conclusive results come back and Walt is sitting on a dead terrorist, known for his involvement in al-Qa'ida, the Taliban, and Jihadist groups. Unsure as to why the terrorist is in the mountains of Montana, the FBI sends out their best agent to assist Walt in his investigation. Special Agent Sam Davis arrives and creates a stir within the Sheriff's Office and Walt has to work with the agent to solve the case.