At the end of the Eastern Jin Dynasty, the dynasty was in turmoil and the vassal regime was divided. According to legend, only those who hold a mirror in their left hand and a sword in their right hand can rule the country. Qingluan mirror and farewell sword were originally the treasures of the Dragon Sect, but they were lost because of the war. The Purple Curse of the Dragon Sage was possessed in martial arts practice, and his internal force was seriously injured, and his life was hanging by a thread. Before Zi Mei died, Yuan Qingsuo, the only descendant of the original Jiaolong Sect, told her the secret of Qingluan mirror and parting sword. Purple charm finally told Yuan Qing to lock them up. These two treasures must not fall into the hands of traitors. Only the real dragon emperor deserves them, otherwise the world will be in chaos. In order to find the treasure, Yuan Qingsuo pretended to be the wife of the Northern Zhou Dynasty and the niece of Yuanshi County, Li Ezi, and took away the family keepsake in the name of falling into the family wealth. During this period, Yuan Qingsuo got to know the warrior Lan Ling Gao Changgong and the Northern Zhou Yu Wenyong respectively, and both of them had an emotional entanglement. Yuan Qingsuo finally helped Yuwen Yong realize the title of emperor, and chose to leave the Northern Zhou Dynasty to live and die with the warrior Lan Ling Gao Changgong.

Princess Lanling's novel finale;

Yuwen Yong destroyed Qi and unified the world, but he was poisoned before, so he died soon after reunification. Gao Qiu first killed Zheng Er, who had become the queen, and then committed suicide. Then grandpa four ran out with the dying snow dance. Clearing the lock finally helped Yuwen Yong realize the title of emperor, and chose to leave the Northern Zhou Dynasty to share life and death with Gao Changgong and the warrior Lan Ling.