During Bo and Cheong's wedding reception, a video clip intending to show their journey of love suddenly flashes a clip of Cheong being intimate with another woman. This leads to the cancellation of the wedding. A year has passed and the single Bo and flirty Cheong maintains their relationship as good friends. One day, the womanizer Cheong brings the conservative Bo to a wife swapping party, at the party, they meet Kit and his wife Man Lai. The four developed a romantic and passionate relationship.

Once upon a time in Hong Kong, there's this traditional medicine oil company that has come seriously close to bankruptcy. However, its bored-stiff staff - the mean manager Ben Chow, sleazy Tyson, love-deficient Hatou, and clueless newbie Rachel - has nothing better to do than fantasizing about all kinds of sexual escapades in their cold drab little cubicles. Thankfully, their company is taken over by an adult toy enterprise from China, and their wet dreams come true when four delectable new coworkers come to jazz up their office life!