Astrid Atomic, a six year old human person, goes to bed every night like every other six year old human person.

But unlike many other six year olds she doesn’t stay there. The minute the lights are off and the coast is clear the Space Cadet siren goes off, her uniform goes on, and 5, 4, 3, 2, 1 - WHOOSH! - she blasts off on board the spaceship Stardust!Along with her best pals Beryl, Professor Quackers and Zoink, Astrid is given her mission from The Chief - to clean up the Milky Way! But when a nearby alien is in trouble and with giant snaliens around, things aren't likely to go to plan!