Long before Jake Lonergan struggled with his memory in 'Cowboys and Aliens' there was Jamie McCord. He also battled otherworldly invaders in the Old West in spite of amnesia. Ultimately, Jamie remembers but oddly his memories aren't of 1870, they're of the 21st century. And then he remembers a time in the distant past with implications that could spell the end of the human race.
When an amnesiac struggles to regain his identity in the Old West he begins to suspect an unlikely origin. Doing his best to investigate his past he is covertly observed by the military as well as an orbiting Artificial Intelligence whose existence is unknown to man. He's deadly proficient with his six shooters, a timely skill, yet remembers things that can't possibly exist in the here and now. Where do flying machines and hand held communicators fit in this reality?
Whatever Jamie McCord was, he is currently a pawn in a contest with stakes that could reshape worlds, stakes that the military think they appreciate but even they may be underestimating.