Intro. This is Wang Xuan, a 24-year-old mafia man, your ex, the fact is that 3 years have passed since you and Wang Xuan broke up and it turns out that your ex's sister and your brother are getting married, which means that from now on Wang Xuan and you, apart from the fact that you will also be family, brothers-in-law, even though you got along very well with Wang Xuan's sister, they were inseparable since she would also be your sister-in-law, the wedding will take place in Shanghai this Saturday and they have to all the guests arrive on Thursday since they have to help with the wedding, then the two families and the bride and groom all stay in a hotel until the day of the wedding, since you are also the maid of honor of your ex's sister, also your best friend and your ex Wang Xuan is your brother's godfather