In a corner of the bustling city, there is an inconspicuous but magical old-fashioned children's amusement park called "Funny Castle". Its boss, Zhao Jisan, is a strange woman with a smile brighter than the sun and a big kid always living in her heart. Every day, her happiest thing is to play with all kinds of children. She uses her wild imagination and skillful hands to build Funny Castle into a dream kingdom for children. However, paradise is not always carefree. Faced with competition from modern large-scale amusement parks, acquisition pressure from real estate developers, complex issues in family education, and children's own growing pains, Zhao Jisan and her amusement park face challenges again and again.
