What lurks in the Dunderberg Mountains? Teenager Cassie, growing up on her family's apple and peach orchard in upstate New York, was the first to see one of the terrifying, strange creatures from the woods around their property. Cassie's crush, El Salvadorian Darwin, thinks it's a Sisimito, a Central American creature of lore akin to the Sasquatch. Then, the family sees more of the frightening beasts, and it's not long before the creatures take aggressive action toward Cassie's family. That launches a life-and-death battle that could have devastating consequences ...