Samantha (Carina Lau), the Hong Kong president of a famous Japanese bra company, made an exception and hired two male designers, Johnny (Lau Ching Wan) and Wayne (Louis Koo). Their boss, senior designer Lena (Gigi Leung), felt that they were not qualified for the job at all, so she often made things difficult for them. The company asked them to design a "perfect bra", but they failed many times. During the work, Johnny and Wayne developed feelings for Samantha and Lena respectively, and finally, with the help of their respective girlfriends, they finally succeeded in designing the "perfect bra".