Synopsis：Three years ago, Yun Yu and Qiao Xin had a one-night stand. Qiao Xin's brother was in a car accident. Qiao's father wanted to sell her to raise medical expenses. Yun Yu saved Qiao Xin at the critical moment. The two agreed to get married and proposed to pay 10 billion yuan in liquidated damages if they violated the conditions. For three years, Qiao Xin hid her vest and worked as a good secretary. When Yun Yu filed for divorce at the end of the three years, Grandma Pei wanted to return to China to see her granddaughter-in-law. Yun Yu pulled Qiao Xin to pretend, but was almost discovered by Grandma Pei during the process.