Ning Yi, a young grassroots boy in Xiling, has a special gluttonous physique, and he is dependent on Pei Fan, who has a blood feud. Later, he becomes bound to the mysterious girl Xu Qingyan because of the exotic treasure bone flute. He also helped him achieve the status of a sword wielder and shoulder the responsibility of saving the world's common people and light. (Source: iQIYI, translated)