On the idyllic planet of Terra, the elders keep the population in check and everyone tows the line, apart from free thinkers such as Mala (voiced by Evan Rachel Wood).
Her best friend Senn (Justin Long) and father Roven (Dennis Quaid) try to curb Maya’s rebellious ways but it is impossible to tame the free spirit. Human spaceships capture some of the Terrians for experimentation but one pilot, Jim Stanton (Luke Wilson), crash-lands on the planet surface.
Mala takes Jim home and nurtures the astronaut back to full health in a cleverly constructed oxygen tent, aided by his robot dog Giddy (David Cross).
President Chen (Danny Glover), the head of Earthforce, is torn between the survival of humankind and the devastation being wrought on Terra.
When he fails to follow the advice of warmonger General Hemmer (Brian Cox), the grizzled veteran stages a coup and unleashes his ships upon the planet.
The film is slickly executed but feels very flat and lifeless.