Li Yan, a martial artist with extraordinary talent, has only a few months left to live due to a terminal illness. When he was in a desperate situation, he accidentally met a man who called himself "Tapir" and was sent into a fruit of the "Yambu Fruit Tree". Li Yan must complete three tasks issued by the system within the time limit, and earn money through boxing matches in exchange for Yambu points to buy medicine that can cure terminal illnesses. As he got to know Longyuan Fortress more deeply, Li Yan was gradually involved in the disputes in the fortress, and also realized that there were other Yambu Walkers competing with him in secret. After overcoming many difficulties, Li Yan finally successfully completed the task and gained a new life.