Aunt Juri knitted Dajeong with care. One day, while exploring her surroundings, Dajeong saw children chattering as they passed by. When Dajeong learned that the children went to school, she begged Aunt Juri to also send her to school. Soon, Dajeong found herself in a first-grade classroom.

However, the children thought Dajeong looked different and strange, and they excluded her, not inviting her to play. Despite this, Dajeong still wanted to play with them and become friends. Then, one day, while the children were trying to tease Dajeong by playing hide-and-seek, they found themselves in danger. What choice will Dajeong make in her attempt to save them? Will they be able to become friends after all?