It's bad enough that Mason has to deal with four scary bullies at school. But now a strange new girl named Ever Midnight has joined his class . . . and everything is about to get a lot scarier.

Ever doesn't eat. She doesn't sleep. She refuses to do the homework. She claims to hunt supernatural creatures called jumpers, who use human bodies as hosts and force them to do terrible things. Mason joins her in the hunt, but learns all too quickly that he can't hunt jumpers without them hunting him in return.

They can make him lie. They can make him steal. They can even get him killed. If Mason and Ever can't destroy these malicious spirits first, then they might just become the next victims!