Ye Fan can travel between the modern world and the Tang Dynasty, living across time and space with Li Yuan, Li Shimin, Empress Zhangsun, and their family in places such as Qiongdao and Pengcheng. They celebrate the Spring Festival together, celebrate Li Shimin's birthday, and accompany Empress Zhangsun as she gives birth to Princess Xincheng, Li Leyan. He takes a group of adorable children out to sea to watch dolphins and fish in the ocean, teaches the princes and princesses modern knowledge, simplified Chinese characters, and Arabic numerals, and eventually sends Little Sizhi, Yinyin, and two other adorable children to kindergarten. The story revolves around everyday life across time and space and the children's growth, creating a warm and healing atmosphere.