In Shanghai in 1932, Shen Yanzhi was the most special cheongsam tailor backstage at Paramount - she had codes hidden in her stitches and information sewn under her silk satin, designed to deliver secret messages to patriots. While customizing a performance cheongsam for a popular singer, she was accidentally involved in an assassination plan, but in the chaos she met Jiang Linzhou, a French Concession detective who was ordered to investigate the case. He is an elite who has returned from studying abroad. He always wears a silver pen on his sleeve, and his eyes are as cold as winter snow. She is an "embroiderer" hidden in the market, with silk threads on her fingertips, and her thoughts are as thoughtful as a spring stream. The two became entangled due to the case, from rivals who tested each other to allies fighting side by side. In Shanghai, where the Japanese army was closely watching and spies were surrounded, they used cheongsam to convey their faith and recorded the truth with pens. In the gaps of the troubled times, they hid a passionate but restrained love. When the final assassination plan comes, they must make a choice between the righteousness of their family and the love of their children - should they forget each other in the world, or should they go on a life-and-death appointment together?
