Returning to the rails fifteen years after the childhood trauma that haunts him, young Lynden Hoover gets help from The Duke, an old hobo who calls America's landscape his home, adheres to an honor code, but is fleeing Short Arm, his merciless enemy. The Duke mentors Lynden, enlisting old Knights of the Road to keep himself and his apprentice safe. When Short Arm murders two of them, the stakes suddenly escalate to life or death.