Lu Xi and Gu Xiaotong have known each other since childhood because their mothers are familiar with each other. Lu Xi is two years older than Gu Xiaotong. The story begins when Gu Xiaotong was 27 years old. At that time, he was already the boss of a company, while Lu Xi was still a white-collar worker struggling to make a living. Lu Xi has a boyfriend named Zhao Haisheng, who is her colleague. The two of them fall in love casually and save money for their future life.
On this day, Gu Xiaotong actually proposed to Lu Xi. It turned out that Gu's mother forced the marriage. Gu's mother was diagnosed with advanced liver cancer, and what she was most worried about was her son's marriage. Gu Xiaotong had no intention of getting married. In order not to disappoint Gu's mother, he decided to get married, but he didn't want to deal with his mother casually. The most suitable candidate was Lu Xi! The two families are so familiar with each other, and it is a joy to become an in-law and learn to treat Mother Gu.
Lu Xi decided to agree to Gu Xiaotong's request. Lu Xi and Gu Xiaotong made a three-part agreement. First, they must respect each other, secondly, they must trust each other, but the most important thing is loyalty. Even if they are playing tricks, they cannot deceive each other. In fact, Gu Xiaotong's private life has always been simple, but for the sake of her own face, Lu Xi still asked Gu Xiaotong like this, and Gu Xiaotong also hoped that Lu Xi would really ask of herself as a wife.
Life after marriage was very dull. Lu Xi satisfied all her desires for money, and Gu Xiaotong's changes became more and more obvious. After marriage, Xiaotong was no longer so chic and kept socializing. Lu Xi also thought about what would happen if Xiaotong had someone she truly loved. She also tried to fall in love with Xiaotong, but Xiaotong's attitude towards her was always respect rather than love.
One day she finally discovered Xiaotong's secret...