Ho Kam-ang (Stephen Chow), a weak, disadvantaged but kind lunch delivery boy, happens to fall in love with Lily (Christy Chung), the girl of his dreams from a local fitness center.

In a side bet made by Tat, if Ho can survive all three rounds, kung fu will regain its public image at the center.

The upcoming match receives much publicity and reporters follow Ho and Tat, wanting to see how a delivery boy can be transformed to a rival martial artist.

On the day of the match, Lily, worrying for Ho's life, rushes to the stadium to cancel it, but is stranded in a malfunctioning elevator.

At the boxing ring, Ho is voted the odds-on favourite to win by the judges because of his lack of fear, which ironically increases Dai-si-hing's own trepidation.

As the match commences with round one, Dai-si-hing rushes in to attack, but stops abruptly when Ho simply turns around and keeps still to confuse him.

In the second round, Tat instructs Ho to wear down Dai-si-hing with submissions and sucker punches while deliberately distracts him by juggling things in the air.