No one’s quite ready for night to come and call it a day out in Luna’s backyard, they’re having too much fun helping daddy in the garden. But as they watch the sun set, they find themselves with another mystery to solve: Where does the sun go when night time comes? Rocketing off into make believe, the trio transform into space rockets and fly off in search of answers. They are amazed to find out its actually the earth that’s moving, not the sun!