Maximum Ride and the other members of "Flock"--Fang, Iggy, Nudge, Gasman and Angel--are just like ordinary kids--only they have wings and can fly. It seems like a dream come true--except that they're still being hunted by new threats at every turn.

This time, the US government wants to keep the Flock under observation, offering a safe haven and schooling in return. But after their incredible adventures in audiobooks 1-3, Max and Flock have grown to love freedom. After escaping the control of the feds, they are surprised to find themselves allied with a group of environmental scientists who might be trustworthy. Besides, what enemy could find them in one of the remotest locations on earth--Antarctica?

There is one: The Uber-Director--literally, brains on a stick--an evil being who has developed mechanical soldiers far more frightening than Erasers. Their quest? To retrieve the Flock and sell them in a global auction for billions of dollars. Will the Uber-Director nab them before Max, Fang and the flock succumb to the dangers of the harsh Antarctic wilderness?