The abandoned maid Yan Jin was framed by her concubine and was expelled from the prince's mansion; she got into the palace by chance and worked as a handyman in the embroidery workshop; she alarmed the clothing bureau with her lost double-sided and different-color embroidery skills; she took over the job of embroidering the imperial dragon robe for self-protection; she discovered that the hidden patterns on the dragon robe contained secrets from the previous dynasty. He was forced to get involved in the secret battle between the third prince and the prince; embroidery became a medium for transmitting information; he accidentally learned that his mother had been the late emperor's embroiderer and died unexpectedly; a secret investigation involved old cases in the Hou Mansion and palace secrets; Shen Zhao, the chief guard who is responsible for the security of the palace, went from suspicion to joining forces; he used the connections in the embroidery shop to build an intelligence network; he was reported to have hidden forbidden items and was almost executed; Shen Zhao gave his life in exchange for the opportunity to investigate; it was discovered that his concubine was colluding with the noble concubine in the Hou Mansion. Intention to plot rebellion; use embroidery as bait to lure the snake out of its hole; embroider a complete map of the conspiracy in front of the emperor to force the opponent to reveal himself; finally the new emperor ascends the throne and rewards according to merit; refuses the reward and chooses to leave the palace to open an embroidery workshop; accompany Shen Zhao to guard the ordinary years.
