In the fourteenth year of Tianbao's reign, the lights of Yuan Dynasty in Chang'an were as bright as day. When Li Yun, a member of the Jinwu Guards, was fighting a fire, he encountered a mysterious Sogdian old man and received a prophecy: "Thirty years of prosperity will eventually come to an end." Three days later, he was ordered to escort Dong Yi to Fan Yang to see for himself the shocking truth of the "state within a state" under An Lushan's rule. The cracks in the prosperous age have appeared, but he doesn't know that the secret message of the bronze mirror he intercepted and the undercurrent of salt and iron he witnessed are being woven into a huge web that will overthrow the Tang Dynasty. From the extreme prosperity of the neon clothes and feathers to the bloody desolation from the ground stirred up by Yu Yangji, a little person was swept up in the torrent, struggling to move forward between the cracks in the history books - how can he hold on to a glimmer of civilization in the collapsed prosperous age?
