“My daddy's sword is the best in the world!” A single compliment from five-year-old Xiao Liyu unexpectedly elevates Li Qingyun's swordsmanship to the pinnacle. Having traveled from another world, he tells his daughter stories of martial heroes while learning peerless martial arts in his dreams. With his daughter's sincere praise, he continually breaks through his limits. From running a martial arts school and taking on disciples to investigating the disappearance of children and protecting the peace of the region, he gradually makes a name for himself throughout the martial world. Yet this formidable master's greatest wish has always been to cure his daughter's cold illness and watch her grow up safely.