Having discovered what Dr. Zetes really wants them for—and what happened to their predecessors at the Institute, Kaitlyn and her friends Anna, Lewis, Rob, and Gabriel have to run for their lives. In doing so, Kaitlyn discovers that Gabriel is a vampire—but that he feeds directly on human life-energy. Kait is caught between golden Rob, the healer, and wicked Gabriel Wolfe, who may just be using her for his own purposes.