Set in the 1920s, it revolves around aspiring architects and their contributions to the country.

Basketball, Baseball, Soccer… When it comes to handling a ball, Cha Youngwoong, a fifth-grade elementary school student, exhibits overwhelming abilities. One day, while cleaning out the warehouse at the request of his mother, he discovers a mysterious marble. At that moment, the villain duo "Team MABORI" and the monster creature 'Pachyla' appear to break the warehouse and threaten the hero, but With the help of the Mechanimal 'Akan' hidden in the warehouse, he uses a mysterious orb - 'Mecard Ball' to succeed in defeating them.

Su Lyuxia, a bright girl, shoulders the mission of maintaining the comic space. She is supposed to enter the body of the supporting actress to correct the plot. However, she enters the body of the heroine in the small fictional world by accident. After checking with the system Shushu, she finds that Bai Ting, a woman who doesn't belong to the world, has occupied the body of the supporting actress. Bai Ting intends to make the supporting actress into the leading actress by changing the plot in the time and space of the small world. In order to prevent the story line from being altered and the small world from collapsing, Su Lyuxia starts to rectify the main plot during one after another confrontation with Bai Ting. Su Lyuxia tries her best to get the altered plot back on track by correcting some branch lines.