During the reign of Emperor Zhang of the Han Dynasty, a rare heavy rain fell in the South China Sea, but it washed away everything on the coast. On that rainy night, the eight-year-old girl Luizhu ran to the beach alone, but met an old swordsman in his seventies. The old man told her an unknown legendary story about the battle of the deer, and told her that she could help the person who could save the people to save the world that was about to be taken away by the devil... Ah Hao suddenly woke up and found that she was in a ruined temple that had been abandoned for a long time. A young man who called himself Liang Cheng rescued her, but she herself had lost four years of memory. A year later, thirteen-year-old Ah Hao bid farewell to Liang Cheng and set out alone to find the person who could save the people...