A few years after the Anshi Rebellion, the Tibetan army invaded the southwest and the Tang dynasty military commander Gao Shi suffered a defeat in battle. Chang’an was in imminent danger. Gao Shi, who was trapped in the besieged city, recalled his past experiences with Li Bai to the eunuch who served as the military supervisor.

In his youth, Li Bai witnessed the tragic Battle of Broken Leaf City, embarked on the path of seeking fair power with the teachings of an old master who saved the world and his teacher Pei Yi. Entering Chang’an for the first time, with no ambitions and pity, Li Bai, who was recommended by Anxi Dufu to enter the government with poetry and literary talent, turned out to be a night marcher to fight against evildoers. Unexpectedly, the conspiracy of blood and rain is waiting in the dark, and the mystery in the alchemy is so heavy. Can the sleeping Chang’an be saved from danger? Can Li Bai grow up to be a real hero in the fight against the bandits?

In Empress Wu’s reign, there are several bizarre deaths in the capital city of Chang’an. The rumors of the Martyrs Shrine’s “Flying Goddess Mural” murder case are getting worse. Di Renjie is ordered to investigate the case. He cracks the mystery of the mural based on the characteristics of the Flower Sermon, which leads to the murderer, Li Luoyu. Soon after, Li Luoyu commits suicide. After multiple investigations, Di finally finds out the true murderer.

Fa Mulan gets the surprise of her young life when her love, Captain Li Shang asks for her hand in marriage. Before the two can have their happily ever after, the Emperor assigns them a secret mission, to escort three princesses to Chang’an, China. Mushu is determined to drive a wedge between the couple after he learns that he will lose his guardian job if Mulan marries into the Li family.