Sadie Callahan's life is as normal as it can be after helping her friend, Jason Lex, save the world, and learning cryptids like Skyfish and Bigfoot are real. Things go bad when Sadie comes home after school and finds a strange man with his hands on her grandmother's neck. Trained in Tae Kwon Do, Sadie strikes and forces the man from their house. Soon after the clash, people around her start behaving oddly. Is she somehow triggering their weird behavior?

Alone and unnerved after her grandmother falls ill, Sadie searches for ways to heal her but uncovers deceit and is forced to...