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.

When Anna Wyncomb is introduced to an underground, all-female fight club in order to turn the mess of her life around, she discovers she is much more personally connected to the history of the club than she could ever imagine.