Gu Changqing, a seventy-three-year-old farmer, is severely injured by a local tyrant for protecting a young girl from his clan and abandoned in the snowy mountains. On the brink of death, he accidentally eats an immortal snow lotus, awakening a lotus mark that allows him to replicate martial arts techniques while rejuvenating his body. Using this extraordinary encounter, he fights local evil forces, obtains an examination token for the Demon-Suppressing Bureau, and enters the martial path to slay demons and eliminate evil. In the end, this elderly man, already nearing the end of his life, uses his strength to protect the peace of ordinary people everywhere.