Slippy promised his uncle to water his plants while he is away. When he finally heads to the greenhouse, he discovers that the watering system he built is broken. The plants are not doing well.  The gang resorts to watering the plants with a hose! But the water instantly vaporizes, emptying the water tank. Ella and Slippy travel to Kepler 22b, a water covered planet. Ella realises that ice does not vaporize so she collects ice chunks.  Back at the greenhouse, the ice melts and the plants are watered, just in time!

The year is 3021. The place is the Milky Way, where eight-year-old Ella gleefully heads out with her friends on exciting adventures of discovery. At only eight, she already knows quite a bit about space... but there is always more to explore!