Ye Qinglan, the concubine of the Hou family, accidentally traveled to ancient times and was forced to marry the Xie family, a merchant from Jiangnan. Faced with the triple dilemma of being despised by her in-laws, coldly treated by her husband, and scheming by her eldest sister, she used the wisdom of a modern craft designer to break through the situation:
Intangible cultural heritage innovation: improving ancient candles, creating the first "luminous candle" and "phantom lantern", using palace lanterns as carriers, turning the Jiangnan Lantern Festival into a stage for political maneuvering, from merchants' homes to the royal palace;
Suspense main line: The Ninth Prince fights for the secret recipe of candle art with the power of "Yinghuosi", her husband Xie Mingyuan is responsible for the mystery of twins, and the mirror cinnabar mole hides the truth about the royal baby change case;
Emotional game: The cold-faced merchant husband is actually the hidden commander of Yinghuo. The two went from suspicion to joining forces to uncover the legacy of the previous dynasty behind the "Mountain and River Map".