Ten minutes before the wedding, wedding planner Qiu Jiayan met the most unwelcome guest - divorce lawyer Wang Xu. The evidence he brought showed that the groom concealed his marriage history and huge debts, and this grand wedding must be stopped immediately. After the wedding was cancelled, the bride handed Qiu Jiayan an old jewelry box stained with blood. The photos in the box actually linked Qiu Jiayan's mother, who had been missing for many years, with Wang Xu's deceased father. In order to find out the unfinished wedding twenty-one years ago, the two had to cooperate. One helps someone enter a marriage, and the other helps someone leave a marriage; from tit-for-tat to mutual affection, they gradually understand in weddings and divorce cases that love is not a vow that will never change, but that after seeing life clearly, they are still willing to choose each other.