A stranger stumbles into the desert town of Absolution with no memory of his past and a futuristic shackle around his wrist. With the help of mysterious beauty Ella and the iron-fisted Colonel Dolarhyde, he finds himself leading an unlikely posse of cowboys, outlaws, and Apache warriors against a common enemy from beyond this world in an epic showdown for survival. A spaceship arrives in 1873 Arizona to take over the Earth, starting with the Wild West region. All that stands in their way: a posse of cowboys and natives.