Kelly (Sarah Jessica Parker) becomes a successful writer, and still has three friends, Samantha (Kim Catrell), Charlotte (Christine Davis), and Miranda (Cynthia Nixon), who are still fashionable and beautiful. This time Kelly is about to marry the man she loves in her life, Mr. Big (Chris North), who owns her own house. She shared her feelings with her friends with excitement. However, the preparations for the wedding made Mr. Da feel the pressure. At this time, Miranda's marriage had problems, because Miranda's words made Mr. Eldest feel even more uneasy about his third marriage. Sure enough, Mr. Big refused to appear on the wedding day, even though he wanted to turn back, it had already broken Kelly's heart. Her friends tried their best to comfort Kelly, and Miranda felt deeply guilty. Kelly moved back to her apartment and started a new life with the help of her assistant. Kelly misses Mr. Big every day and becomes angry when Miranda tells her about her guilt. A few months passed, and Charlotte met Mr. Big again. He sent Charlotte, who was about to be on her way to the hospital, and also looked forward to Kelly's appearance...