Kung and Kin's rivalry goes way back to the seventies when they fought over the same girl, who eventually became Kung's wife. Now they run competing phone stores right across from each other on Mongkok's busiest street, and stretch their minds trying to outdo each other with crazy promotions.

Five graduates from different years come together to celebrate their secondary school teacher Master Jude's 80 year-old birthday. Master Jude is a happy-go-lucky bachelor who enlightened them on the matter of sex during their school days. Since all of the five men have marital problems, this is a good time for them to meet and share their grievances. However, during the celebration party held in a hotel, they encounter 5 pretty, sexy young models. They fall for each other and have a love-fest in the hotel.

Lan Kwai Fong (LKF), a well-known party location in Hong Kong with loads of nightclubs and bars. Everyone likes to go to LKF for fun, one night stands or even true love. LKF has captured the joys and sorrows of many... One night, Steven - a regular of LKF met the flight attendant - Jennifer. They had sex on the first night they met but both could feel love come along. They had another date on New Year's Eve. Unfortunately, misunderstanding tore them apart and Jennifer decided to disappear from LKF. After eight months, Steven meets with Jennifer again and hopes to restart a relationship with her. However, Jennifer is no longer single, she's now his boss, Leslie's girlfriend. At the same time, Steven receives a call that his close friend collapsed and had to be sent to hospital. His friend encouraged him to follow his heart. When he finally decides to tell Jennifer about his feelings...