Arushka is held captive on the planet E-Delta, where the Bioplex structure is the only thing that stands between the inhabitants and their hostile environment.
After Drako's raid, Horizon Foundation security orders Noah be confined to home for his own safety until the crisis is over. Chip finds Clio in the Wildlife Reserve and together with Arushka and Chip, begins to teach Clio about animals.
Chip helps Noah escape from his guarded home and the pair quickly discover their friends have been taken to E-Delta. Clio and Curly join forces to help Kwan and Arushka rescue Moshi.
Moshi saves Drako from being trapped outside the Bioplex under the red giant sun. Ivan loses confidence in Drako's leadership and dishes out his own punishment to anyone who helped Arushka escape with the animals.
While the young Nomads set up camp in a cave shelter, Noah and Arushka infiltrate the Bioplex. The key to Drako's strike on Earth is the Thunderstone canister.
Noah and Drako are put in an uncomfortable situation when a wormhole opened by Liz brings them back to Earth alone. Ivan seizes the opportunity to assume leadership and take over the strike on Earth.
Noah must find out what happened to the lost parents of the E-Delta kids to keep Earth from being put under attack by E-Delta. Little does he know that Ivan has imprisoned Drako along with the other Nomads.