Pastor Jacob and his wife struggle to make their way in Wild West, praying nightly for a miracle to happen as his wife cannot conceive. One night, a stage coach barrels into their yard and inside is a dead man and a baby. His wife insists on keeping the baby, believing that God has delivered him to them. A few months go by and then a mysterious woman appears in town, looking for her child She's a demon, a succubus, and wants her the baby back for a sacrifice. But the pastor and his wife won't give up the child without a fight.