From the introduction:
The Late 1800's is what some people have branded the "Wild West". Frontier towns and cities, Cowboys, Indians, and Gold Mines. But mixed within this untamed time lurks something wicked. Demonic being burst through a maelstrom and are causing mayhem in the dusty streets of the American Wild West.
Demon hordes destroy farms and stalk the unsuspecting. The accuser of the brethren is hot on the trail of destruction and you may be the only thing that can stand in his way. With the Bible in your hand and a six-shooter on your side, you may by the grace of God, help to gun down these demonic terrors in a blaze of glory. The day of evil is here, will you be able to stand?