Seraphim Falls makes the most of its spare 20-minute opening, little more than an excuse to see Pierce Brosnan desperately fleeing Liam Neeson's nearing posse (honestly, the guy gets punished in all manner of ways, gunshot, wilderness, what-have-you). There's minimal dialogue, save for a few lines of Neeson's growl, which is cause enough to start running. The source of their shared acrimony is clearly established later on, but for a good half of the movie, it's an unfettered chase.
And ultimately, it works, at least until the story starts winding down in the third act. By that point, the hatred's been clarified, some of the sadistic fun has gone and - one way or another - the conflict gets solved.
It doesn't play like a conventional Western, and you could argue it's really an action movie. But not a bad one in either case.