If they knew what I was, they'd be after me. So why don't I just hide? They've already got my parents. And if I don't find her soon, my twin sister will be next. *** The night of their seventeenth birthday, after four months of chasing her, Thessa finally catches up with her twin sister Lusi. But Thessa isn't the only one who's after Lusi. As Thessa and Lusi team up and turn the tables on their pursuers, they start to suspect that the enemy they've been taught to fear their whole lives doesn't even exist - and the real danger comes from much closer to home.