The story follows Hunter and Yat, two new hot shot recruits, who under the watchful eye of their commanding officer, Yuk Pai, rise quickly through the ranks, enduring much mental and physical hardship along the way. Their new found skills are put to the test when renegade SDU member returns from seclusion in Thailand to wreak havoc on Hong Kong and the SDU's most secret missions.
May Chan (Anita Lee) becomes a hooker in order to save money for her son's liver operation in Australia; she spends all of her free time feeding her palsied mom; then, she gets raped and accidentally killed by some randy telephone workers. Officer Ma Fai (Sean Lau) investigates, and discovers May Chan's ghost, dressed in red chiffon, is killing off her murderers with electrical cables.
