During an outing in 2401, three teenagers named Di Lu, Yaoyao, and Xiao An discovered a mysterious object at the center of the Milky Way galaxy. This galaxy's star held an unsolved mystery that intrigued Dilu, so he convinced his two friends to embark on a journey through the universe to uncover the ultimate secret. Thanks to a skilled spaceship pilot named Lily, the group set out to explore the nine planets within our solar system. With help from the gods of the universe and their own courage and intelligence, they eventually solved the unknown mystery surrounding the star of the Milky Way.