Planet Kepler was once lush and beautiful, but after the Callaro plant was exploited to extinction by Earthers, the planet is now dry and dying. In an outer space 3-D animated adventure, three brave Kepler SpaceKids – Axel, Jono, and Gaga – journey down a volcano to retrieve the last Callaro seed, battling evil Earthers, giant spaceships, and destructive robots. They aim to save their planet by following the ancient legend of the lost Callaro oasis.