Never leave home without salt. Penelope is a witch, part of a secret society protecting humans from demon attacks. But when she was a child, a demon killed her parents—and stole her magic. Since then, she’s been pretending to be something she’s not, using her sister’s magic to hide her own loss, to prevent being sent away. When she’s finally given the chance to join the elite demon-hunting force, Penelope thinks that will finally change. With her sister’s help, she can squeeze through the tests and get access to the information she needs to find "her" demon. To take back what was stolen. Then she meets Carter. He’s cute, smart, and she can borrow his magic, too. He knows her secret—but he also has one of his own. Suddenly, Penelope’s impossible quest becomes far more complicated. Because Carter’s not telling her everything, and it’s starting to seem like the demons have their own agenda…and they’re far too interested in her.

Up until recently, Penelope was a witch with no magic. After having it stolen by a demon when she was just a child, Penelope had been forced to rely on sharing others’ powers as she went through the grueling training required to become an elite demon hunter. Now Penelope has more magic than she’s ever known. And when you’re this powerful, who needs salt to keep the demons away? But power has a dark side. Carter Prescott just wants to hunt demons and be with Penelope. But suddenly, witches who formerly had no magic are developing terrible, out-of-control powers. Now the world Carter swore to protect isn’t just endangered by malicious demons―it’s threatened by the same witches who once defended it. And Carter is horrified to see his girlfriend starting to change. Stronger. More powerful. Unrecognizable. It’s just a matter of time before Penelope changes into something far beyond his worst fears...