Apocalypse Then

The zombie apocalypse comes to the old west when in 1879, a US Marshal travels from Wyoming to Montana to search for a missing federal agent. The Marshal and his posse get far more than they bargained for when instead of finding the missing agent they find they countryside filled with mysterious blood thirsty ghoul's hell bent on feasting on live human flesh. There is nowhere to run, nowhere to hide and it's all out war between the living and the dead.