In the winter of Tianbao's fourteenth year, the last painting of Chang'an City was soaked in blood.
When the young painter Li Mubai painted the missing corner of the Golden Ou at the christening of the imperial concubine, he did not know that he was standing in the cracks of the overthrow of the dynasty. A scroll made from the remains of the former prince, a tiger charm that can mobilize the ghost cavalry, and a score of colorful feathers that hides the secret passage of the Huaqing Palace - Anlu Mountain's iron hoof has not yet knocked on the door, but a secret war about the jade seal passed down has already torn apart the fabric of the prosperous Tang Dynasty under the colorful feathers.