A contract binds two people who each have secrets.
Xuan Che needs an "obedient" wife to end the turmoil in the family about his marriage, and take this as an opportunity to officially take over the core power of the group. Chi Ying needs the identity of "Mrs. Xuan" as a refuge and springboard to get up close and personal with the wealthy circle that may have concealed the truth about her sister's death.
The wedding caused a sensation in the whole city. In front of others, he was a gentle and considerate husband, and she was an admiring and adoring wife. After they were married, they drew a clear line between each other, living under the same roof but becoming strangers. Xuan Che only regarded her as a useful chess piece at first, and even became irritated and deliberately treated her coldly because her eyebrows looked a bit like his deceased first love in his memory (who was actually Chi Ying's sister).
Until that top art auction, an ancient painting that was rumored to have been lost suddenly appeared, and the experts were helpless. In a corner where no one was paying attention, Chi Ying was invited into the secret room. The next day, news of the perfect restoration of the painting shocked the industry, and the identity of the mysterious restorer "Firefly" sparked speculation. Xuan Che looked at the familiar, focused and calm figure on the surveillance camera, and realized for the first time that he had never really known this "contract wife".
At the same time, Chi Ying's investigation gradually reached the core, and danger came quietly. When the cold gun was pointed at Chi Ying in the dark alley, Xuan Che showed up with an unprecedented rudeness and protected her tightly behind him. The contract had long since deteriorated, and his cold world was filled with the glow of fireflies because of her. When the truth was revealed, they discovered that their fates had been intertwined many years ago. Xuan Che pushed her against the wall with red eyes: "Chi Ying, the contract is void. In this life, you will never ask me to stop."