During the reign of Emperor Yizong of the Tang Dynasty, a jailbreak occurred from the Dali Temple Prison in Chang'an. Among the four escaped prisoners, one of them was Yu Xuanji, a famous poetess in Chang'an. The prison break incident made the emperor furious, and he assigned Jingzhao Yin Duzhang to investigate the case. After some investigation, he found traces of the prisoners escaping to Wutai Town. As a result, Yu Xuanji was successfully captured there, but on his way back, he was intercepted and killed by a mysterious organization in the canyon. Liu Erlang, the Marquis of Wu of Chang'an, was ordered to start hunting down Yu Xuanji and others. Liu Erlang discovered that there were many doubts about the case and encountered many strange events. At this moment, Liu Erlang did not know that he had fallen into a more dangerous whirlpool of conspiracy.
The ending is not bad