This story follows Si Nan, the 20-year-old young master of the Si family, who returns from abroad and is deliberately approached by Gu Weiyan, the 23-year-old president of the Gu Corporation. Gu Weiyan fell in love with him at first sight three years ago. Mistaking Gu Weiyan for his future sister-in-law, Si Nan eagerly tries to bring them together, unaware that he has already fallen into her gentle trap. Through misunderstandings, testing each other's feelings, and protecting one another, their affection gradually grows. Gu Weiyan fiercely protects the love she cherishes and clears away the dangers surrounding Si Nan. Meanwhile, the rebellious young man gradually falls for her. In the end, they overcome every obstacle, choose each other wholeheartedly, and remain together in sweet happiness.