High-speed, action-packed comedy space adventure for six to eight year olds about Rocket Boy, the speediest delivery boy in the universe. Rocket Boy is told off for playing outside when there's an urgent delivery of vaccine for a planet in the path of a deadly data flu virus cloud. Rocket Boy apologises, but Grandpa is really angry - he wasn't like that when he was a lad. To make sure Rocket Boy delivers in time, Vector modifies his engines. Unfortunately, he goes so fast that he travels back in time where he meets Kid Sat and Intern Square, the pre-teen versions of Grandpa Sat and Dr Square. Quite unlike his older self, Kid Sat is a cocky, playful, wisecracking young satellite and Square is an insecure, nerdy computer who carries his brain around in a rucksack. In his quest to mend his engine and return to the future to deliver the vaccine, Rocket Boy inadvertently helps Kid Sat grow up a bit and sets Intern Square off down the path to villainy.