When a bolt of lightning causes a Boston-wide blackout on her sixteenth birthday, Willow Jane doesn't think anything of it--until she begins stopping time, until she comes face-to-face with her menacing familiar, until her sister disappears. But these aren't the only strange and horrifying things to come out of the storm. An ancient witch named the Shadowless has awoken and escaped from her crypt, and she's looking for revenge on Willow Jane's family.