At the end of the Zhenguan period of the Tang Dynasty, Emperor Taizong Li Shimin felt that his time was running out, so he secretly summoned Xuanzang, Yuan Tiangang and Li Chunfeng, three representatives of Buddhism and Taoism, and ordered the three people to use Buddhism and Taoism to maintain the Li Tang Dynasty forever. After the three people accepted the order, although they were reluctant, in order to repay the emperor's favor, they still took the risk of divine punishment and tried to use heaven-defying methods to turn things around. However, a series of political and palace struggles caused the plan to go wrong, resulting in Li Tang's kingdom lasting only 289 years. For this reason, Li Xiuxiang, a descendant of Li Tang, embarked on the road to find the truth...