As the son of the Boogeyman, Ed struggles against his very unscary nature to make his father proud. But Fright School is hard for a kid who's more spooked than spooky, and it looks like he's doomed to fail. Until one fateful night, when Ed ventures into the human world to prove himself worthy and instead discovers he was switched at birth with the Boogeyman's real child, the creepy little Mary Scary. Can these two mismatched misfits help each other fit in? Or will the Boogeyman's enemies make sure their true identities remain a secret forever?