On the wedding day, the overbearing female president Shen Xingyu (played by Zhao Yaoke) lost her fiance. In a hurry, Shen Xingyu chose the company security guard Zhao Wudi (played by Yang Yeming) to replace the groom, and the two agreed to get married. After marriage, Shen Xingyu and Zhao Wudi made three rules, and the two got along like roommates. However, in the face of a crisis-ridden situation, Zhao Wudi protected Shen Xingyu all the way, saved the day again and again, and helped Shen Xingyu find out the truth about her brother's death. As they got along day by day, Shen Xingyu also looked at Zhao Wudi with admiration, and the two gradually fell in love. Zhao Wudi's true identity also attracted the attention of many forces. The sudden appearance of the mysterious boss put the two into a new crisis. At the same time, Zhao Wudi's hidden identity was finally exposed. The two opened their hearts to each other and defeated the mysterious boss together. However, after the mysterious man fell, a bigger conspiracy behind them was sweeping towards them...