During the fourteenth year of the Tianbao Emperor's reign, the An-Shi Rebellion erupts, forcing the Emperor to flee west. Eunuch Chen Jing Bian reigns supreme in Chang'an. His Dark Night Firefly Map holds the secrets behind the lives of important figures, prompting a wave of spies to target him. Meanwhile, Feng Yin Niang, daughter of a military family, ventures into Chang'an, posing as a doctor and seeking an opportunity to seize the Firefly Map in order to uncover the true culprit behind the Feng family's murder.(Source: Chinese = iQiyi || Translation = MDL)