This book is about a group of kids who discover that their substitute teacher is not only a football player for the town team but the bogeyman. While there real teacher {who they think is a vampire} is sick they, they have a very strange sub teacher. He is tall with large muscle and always wears dark clothes. When a certain kid doesn't do his homework the teacher says he will get him and that night the boy couldn't sleep because there was a strange noise under his bed. His friends thought nothing of it until kids all over the school were scared to sleep. They went to a football game and snuck into the locker room to snoop through the teacher's locker. When they discover his secret he disappears and the regular teacher comes back to school.