“There are no such things as vampires. Look for another explanation.” —Z Becka Williams believes that—or at least she wants to. But there are some pretty strange things happening. Things that even Z, her mysterious friend, cannot explain. Z says there must be another answer—but the things Becka has seen seem so real. A girl is being stalked—and attacked…by someone who only comes out at night. Becka and her friend Ryan must find the truth before their new friend gets hurt—and before they become victims themselves!