Max, Fang, Iggy, Nudge, the Gasman, and Angel are kids who are pretty normal-except that they're 98% human, 2% bird. They grew up in cages, living like rats, and now they're free-but being chased by the wicked, wolf-like Erasers, who've kidnapped Angel. Led by Max, the "Flock" embarks on a quest to find Angel, infiltrate a secret facility to track down their parents, get revenge on an evil traitor, and try to save the world-if there's time.