The story tells about Muen, a nameless man who loves to get into trouble. One day, he accidentally becomes an important guardian of the moon. On his first day in office, he makes a big mistake, which indirectly leads to the theft of the sun, the disappearance of the moon, and chaos in the world. So, he has to join hands with the guardian of the sun and the wax girl Xi'er to embark on a great adventure to find out the mastermind behind the chaos and save the world.