The boyfriend of three years always puts his white moonlight first. On the wedding day, he even leaves behind his girlfriend dressed in a wedding gown, accompanying his white moonlight to hide in the fire escape and refusing to return. Amidst the gaze of all the guests, Xia You takes off her ring and cancels the wedding. She dials the phone number of the man who had said he would wait for her anytime. That man arrives on schedule, bringing a fully prepared set of wedding arrangements. From temporarily changing the groom to marrying into a top-tier family, her life completely turns around within a single day.