The war between humans and Centaurians has been going on for as long as Lilli can remember, about as long as she's been living at Waynard's Military Academy on Earth. But Lilli has a secret; she herself is a Centaurian. You see, Centaurians have a symbiotic relationship with a bacteria that is deadly to humans. Lilli has never had an issue keeping herself from touching others, until Tess shows up at the Academy...