Space nerds Infinity, his best friend Gabriel, and his sister, Twilight, are on the run, spurred by the arrest of their astrophysicist parents who have decoded a mysterious message from Mars. Pursued by President Harker's secret agents, they piece together clues pointing to the existence of a galaxy-wide conspiracy. The three kids track down retired legendary astronaut Gerald 'Fox' Fuller. When Fuller tells them the space shuttle on display at the science museum is fully operational and ready to launch, they know they must steal it and blast into orbit. Their mission: Destroy the military's orbital space weapon before Harker can deploy it against the peaceful aliens approaching Earth.