Lanxin Yu

The film was adapted from a real story, that tells a young boy Wang Xinyang's life has completely changed because of sudden leukemia. Facing the unknown tomorrow, Xinyang is still optimistic and strong.

Class 18, the notorious yakuza class in Wutong Middle School received a letter from their future selves one day. The letter accurately predicted what would happen to class 18 during their high school years, and asked the students to complete three impossible missions to save their sick math teacher. To avoid the misfortunes written in the letter, the bad kids called a truce and gradually developed a heartwarming relationship with the Math teacher on their journey to shift the track of history.