Former classmates Alexandra (Stephy Tang) and Alexis (Kary Ng) may share the same name, but they couldn’t be more different. Alexandra is beautiful, intelligent, rich, and completely insufferable. Self-centered and patronizing, she’s an expert in quick put-downs, nasty name-calling, and brokering gossip into profit. Alexis is a simple-minded, pure-hearted, and hard-working gal who is constantly bullied by her future sister-in-law’s family with whom she stays. Crossing paths again by chance, the two girls don’t want anything to do with each other – until a freak accident causes them to switch bodies!
In McDull, the Alumni, our protagonist has grown up. He is no longer the little boy who banters with his mates at school. How he wishes he could just go on bantering all day long with his mates at the renowned Flower on the Spring Field Kindergarten. But that is not to be. Like all grown-ups, he has to grapple with harsh reality. McDull and his mates are scattered all over the place. Each one of them has to find his or her own path. In each of their hearts, they know they have failed. Meanwhile, life goes on in the kindergarten. Someone strums a guitar and the pupils chime in to the song: Puff the magic dragon, lives by the sea… A dragon lives forever, but not so little boys. With hindsight, McDull believes this could well be the maxim of the Flower on the Spring Field Kindergarten alumni.
Sammy, growing with women all his life, meets Suet in the MTR and falls for her at the first sight. One day, Sammy goes back to his office and to his surprise, Suet is there as a newcomer of their company together with Strong. Strong and Sammy are childhood rivals. However, their company asks them to create a new advertisement. From that day, love starts growing between Sammy and Strong. Their advertisement is a way success, and Suet finally falls for Sammy’s talent and starts dating him. Heartbroken, Strong decides to quit the job. Sammy finally realizes Strong is the one he loves. On Strong's farewell party, Sammy tells her how much he loves her, will Strong accept Sammy's love and have a happy ending?