When a strange signal pulsates through all cell phone networks worldwide, it starts a murderous epidemic of epic proportions when users become bloodthirsty creatures, and a group of people in New England are among the survivors to deal with the ensuing chaos after.

John James is a writer; his wife has left him. He moves with his two middle-school children to an isolated house off a dirt road in South Carolina. The property has an Indian burial mound, which fascinates his daughter, Louisa, who’s entering puberty.