Yunxiu, a gifted embroiderer from Jiangnan, is mistaken for the Marquis’s heir’s fiancée because a betrothal letter embroidered on silk is delivered to the wrong person. To protect her family’s reputation, she reluctantly takes the other woman’s place, only to discover that Xie Lin, the heir, is a “frail” young man who despises formalities and wants nothing more than to withdraw from the world. They decide to go along with the mistake and agree to be a couple in name only. But as sincere feelings quietly take root through their exchanges of embroidery, poetry, and painting, Yunxiu’s true identity teeters on the brink of exposure, and a startling secret behind the misdelivered letter comes to light…