An alien astronaut crash lands on planet Earth where an evolved species dominate. The search for intelligent life begins or Earth will be destroyed.

After a mass shooting at a police funeral, reclusive ex-cop Gannon finds himself unwittingly forced out of retirement when he realizes that the killer belongs to the same militia he joined after quitting the force. Understanding that the shooting could set off a chain reaction of copycat violence across the country, Gannon quarantines his fellow militiamen in the remote lumber mill they call their headquarters. There, he sets about a series of grueling interrogations, intent on ferreting out the killer and turning him over to the authorities to prevent further bloodshed.

The year was 1887, in a little-known town in Texas situated on the banks of the Brazos River. Brazos was once a quiet and peaceful place to live and raise a family; but that was before the Nate Jones Gang rode in.