Due to the invasion of the evil forces of the Black Star Kingdom, the Star Prince of the Kingdom of Fame and his maid Haeri flee to Earth. Growing up under the name Sundol in an Earth family, Sundol befriends the scientist Bbosik, his assistant Ddungbo, and Inkyung. Finally, the witch of the Black Star Kingdom comes to Earth to eliminate Sundol. To rescue Sundol in danger, the hidden maid Haeri reveals her identity, leading to a fierce battle with the witches. With the help of Bbosik, Ddungbo, and Sundol's friends Jangmi and Ppippijjangu, Sundol defeats the witches and leaves Earth with Haeri.