During the Xiantong era of the Tang Dynasty, Lu Dongbin received the alchemical formula of Han Zhongli and the sword art of the Five Dragon Lords at the Immortal's Cave on Mount Lu, where he cultivated the Dao and became an immortal. Disguised as the magistrate of Xunyang County, he slayed demons and drove out a plague, leaving behind a sword spirit on Mount Lu to guard its spiritual veins. A thousand years later, Zhu Yuanzhang and Chen Youliang fought their decisive battle on Lake Poyang. The sword spirit of Mount Lu appeared to aid Zhu Yuanzhang, helping him lay the foundations of the Ming Dynasty. Behind it all lay a thousand years of devotion and missed chances between Lu Dongbin and Bixia, daughter of the mountain god of Mount Lu. She merged her primordial spirit with Mount Lu's seventy-two peaks, while he kept the Immortal's Cave sealed forever with his sword spirit. They swore their vows to the land, yet were never destined to stay by each other's side.
