Li Fei mysteriously disappears from his home, leaving his sister Li Xi Ran to search for him without success. Three days later, just as she's about to report him missing, he suddenly reappears from his bedroom, dressed in ancient clothing, a sword at his waist, long hair flowing—a handsome and extraordinary figure. Li Xi Ran asks where he's been for three days, and he replies, "The Jianghu." When pressed for details, he reveals he'd time-traveled to a wuxia world and spent thirty years there. His sister is skeptical, but he demonstrates his profound internal energy, proving his claim. The story follows Li Fei's ability to traverse different worlds and the reasons behind it.