•Double substitutes, misplaced identities: Shen Qingyi married on behalf of his sister-in-law, and Xiao Jingchen married on behalf of his deceased brother. Neither of them was the person named in the marriage certificate. Red silk wraps around the wrist, but each has a secret and tests each other. Emotions quietly sprout in lies, and intrigues compete fiercely under the mask.
•Pursuing the truth, entangled by fate: Behind the marriage contract, there are layers of shady stories including the death of Xiao's eldest son, the change of military power, collusion between aristocratic families, and the acquiescence of the royal family. During the investigation, Qingyi discovered that she was not only a stand-in, but also a "scapegoat" carefully selected by the Shen family's mistress to cover up her crimes.
• Dilemma of friendship, love and hate: Qingyi and Jingchen gradually fell in love as they conspired to break the situation, but they were trapped by their substitute identities, family hatred and old ties. Qingyi cares about the old piano master Gu Huai, while Jingchen carries the legacy of his brother. His emotions are pulled between reason and heartbeat, which is full of tension.
•The dilemma of the system, individual awakening: caught between the "iron law of marriage contracts" and the "custom of proxy marriage", the fate of individuals is like duckweed. Qingyi went from being a passive substitute to actively playing chess, and finally challenged the system itself, completing the transformation from "being written" to "self-writing".
