Zach Lopez has an identity crisis. Zach's friend has an evil double, and it's impossible for Zach to know who he can trust. Zach has lived in Devils' Pass long enough to know that the mysterious shapeshifters can only be monsters from the otherworld below the town. Worse, he discovers that there may be a larger evil coordinating the attacks from the Otherside. Zach and his friends need to keep the shapeshifters from taking over Devils' Pass-and enslaving all of humanity.