During the seven years of Hong'an, murders occurred frequently in the capital. The embroiderer died mysteriously, the noble girl's bones were fragrant, the imperial doctor disappeared in the mountains... The murders all pointed to a palace secret twenty years ago. Mu Yi'an, a female embroiderer, overturned the case for her father, but she was involved in a conspiracy that shook the fate of the country. When the "Sapphire Case" crime certificate book appeared in the world, she realized: some people want to live forever, some people want to usurp the throne, and what some people want to do... Is to let the entire Ming Dynasty be buried with them.
