My good friend Yangwu dropped out of school due to illness and was unable to attend the Biyuan ceremony. With him in the Violet group of Chaoyang Kindergarten, Kang Na (Aicai Lutian), Tushi Sato (Shisei Sato), Meiqin (Honda Wangknot), Junyou (Hiroshi Kuroda) and Youyi (Norihara Liangxiang) sneak out of the kindergarten. from Shinjuku to Gaowei on the central line train to find their good friends. They were inadvertently separated from Youyi at the transfer station and encountered a homeless uncle who would turn people into corn (played by Yide Kishi). In short, the long journey is full of happiness and hardship, and their pure friendship is also tested. At the same time, the kindergarten and parents are in a hurry. Wan Li (Mashima Guang), who is the teacher of the Violet group, gets clues from Youyi and embarks on the journey of search alone.