 Ah Wong is a 30 year old man with an IQ of a little boy, however, he seems to find ways to make everyone around him happy and lucky. Ah WOng grew up with his best friend Catherine, who he always called her "Little Wife". Throughout the childhood years, Ah Wong replies very much on Catherine until she decided to study in New York. The two of them had to separate for 4 years. Ah Wong gave all his savings to Catherine, and he was thinking of marrying her when she returned. Catherine graduated and came back to Hong Kong and worked for Chung Kam-Wing s firm. At work, Catherine met Michael, Wing s son. And Ah-Wong luckily can work in the company too because later Wing found out Ah Wong is his lost son...