Time travel is messy. And when your roommate is lost somewhere in the timeline, it gets even worse.

Simon's missing, and it's all my fault. I've been bouncing through centuries like I'm on some kind of magical rollercoaster, trying to find him. But when I finally discover a wooden device that helps me control where I go, Prentiss?the vampire nightmare I can't seem to shake?steals it. And he's not alone. He's teamed up with a tall, creepy guy from the Chronomancers, and together they want to rewrite time itself.

Now, I have no way of pinpointing Simon, and every leap through time feels like a gamble. If I can't get the device back, not only will I lose Simon for good, but Prentiss and his new ally could change the past?and future?in ways I can't even imagine.

Time's running out, and this time, I can't afford to lose.