Three men drive into the desert at night to wrestle with an unspeakable evil.

In 1859, families discover the lure of the Old West as they settle in territories from Wyoming to Kansas. Meanwhile, a gruff cowboy finds himself on the run with a prostitute and a young boy after killing a fellow gunman.

Phil and Claire Foster fear that their mild-mannered relationship may be falling into a stale rut. During their weekly date night, their dinner reservation leads to their being mistaken for a couple of thieves—and now a number of unsavoury characters want Phil and Claire killed.