Both Earth and E-Delta face total destruction. It is up to Noah and his friends to save both planets and the people on them. In doing so, will Noah make the ultimate sacrifice?
Noah sends Drako back to E-Delta to try and stop Ivan from destroying Earth. However, Drako is taken prisoner with the others. Drako and the Nomads attempt escape.
When the wormhole is activated, Noah and Drako are transported back to Earth. Meanwhile, Arushka, Kwan, Chip and Clio are captured by the E-Delta kids.
After rescuing Kwan and Clio, Noah and Arushka sneak into the E-Delta bioplex to recover the stolen canister of Thunderstone. While there, Noah discovers startling information about his future.
Noah and Arushka plan a trip to E-Delta to recover the stolen Thunderstone and stop Drako from destroying the Earth. On E-Delta, Clio faces banishment for helping Arushka and the others escape.
Noah and Chip investigate the mysterious Sid Greenaway. On E-Delta, Arushka and Kwan devise a plan to get themselves and the animals back to Earth.