Song Jin, the richest man in Nancheng, was arranged by his family to marry his business partner Gu Yanchen. Gu Yanchen had a perfunctory attitude and acted indifferently and perfunctorily every day as the wedding preparations took place. But the night before the wedding, Song Jin unexpectedly learned that the new female secretary next to Gu Yanchen was actually his biological sister who disappeared ten years ago. Song Jin instantly understood that this marriage was a chess game set up by someone behind his back. She decided to use her knowledge of her sister to solve the game within the game.
The full text revolves around "wedding planning is a game-breaking plan": Song Jin uses the wedding as a stage, secretly setting up chess pieces in the hotel, dinner, gift list, and venue layout, and step by step reveals the insiders behind the scenes - including her most trusted uncle and the Gu family. Finally, on the wedding day, Song Jin sent his sister away with her own hands, allowing the unjust people to be defeated one by one.