In this sci-fi fantasy for young adults, a sixteen-year-old-girl named Silver Spike wakes up at a human fortress where the villain, James Stoshen, tortures her. She escapes and later finds a refuge fortress with the help of an animal that can stand on two legs. In this fortress, mutated people named Phlefidides (fle-fi-dides) live. They are part human, part animal. She befriends two of them (Spikey and Bull Back) before the fortress is attacked by Stoshen. Silver Spike is shot twice, but wakes up to discover that she can't die. A mutant named Rhino Horn helps her before Stoshen can attack...