One evening when a group of friends are camping in the woods near a loch one of them ventures off and comes across a white stallion standing alone in the forest. He approaches the horse only to be taken and never seen again. When the rest of the group goes looking for him, they all end up disappearing, too. A year later on the anniversary of their disappearance, the brother of the first person that went missing set out to the loch where they disappeared to find out where they went and what happened to them, only to end up in the middle of something horrible and scary and becomes the new prey.