 A leisurely, beer-filled vacation for a group of partying students turns into a nightmare. After contracting a whitewater river tour, the kids learn that something is stalking them on the legendary Mogollon Rim. Some people believe it to be the mythical Mogollon Monster, but others aren t so sure. No one is safe, including the staff of the river tours, as a force wreaks havoc, slaughtering anything in its path. No phones. No weapons. No chance. The only thing separating the students from certain death is how fast they can paddle.