The 3-tiered satellite has completely inverted but Edgar still finds himself scaling the interior crevices, searching for something that he cannot define.

With encouragement from Dr. Kincaid and Vincent he discovers an incredible way to reconnect with the Dark Planet. After journeying to an unfamiliar and very unpleasant land Edgar must navigate the deadly forests - full of creatures far more frightening than anything he has seen on Atherton - and join the child workforce of Silo 7, where Dr. Harding (the mad maker of Atherton) was raised. With the help of new friends, he explores where the idea of Atherton was born and seeks to unlock Dr. Harding's secrets to determine if there is hope yet for this older, sicker world.

Meanwhile, Samuel and Isabel have their own adventure inside the depths of Atherton. Looking for clues about Edgar's disappearance, they stumble upon Dr. Harding's greatest secret - a real dragon who will play a vital role in the doctor's grand scheme to save the Dark Planet. In the final thrilling chapter of this epic trilogy, we meet an engaging new cast of characters and Dr. Harding's ultimate plan comes together in an incredibly satisfying conclusion.