In realising their scheme to rule the underworld, the Poisonous Snake Gang breeds the 'Blue Poisonous Bees' and sends Red Rose to the Flying Dragon Gang to execute the 'Flying Sting' mission. Chased by Lung King-tin, both of them are captured by Anna Tai of the Female Monster Gang. The three gangs fight for the possession of a nuclear pistol and allegiances shift as the agents fall in love.

Ghost-faced To is murdered in a mortuary after paying a visit to Muk Lan-fa. A set of teeth is found missing from another dead body. Lan-fa’s sister Sau-chen follows the leads on a business card To left behind to a dental clinic which suddenly bursts into flame. The news of her sister’s abduction by the infamous Japanese criminal Katsu Saburo soon reaches Lan-fa. Working together with her police friend Ko Cheung to crack the case, Lan-fa analyses photo evidences in minute detail. The duo order the retrieval of a pole that has survived the explosion intact while lying in wait at the clinic. Sau-chen, who has escaped, saves the duo from the chiller where they are detained. Inspector Yeung retrieves the operation plan concealed in the pole and the secret codes in the set of teeth, but the spook is shot dead by Katsu before he could reach the Hell’s Gate and the treasure buried there. Constable Kwan, and others and wipes out the gang at the Hell’s Gate.

The agile and cerebral fighter Kong Yin is invited to join the police SWAT team. Kong is soon sent on an undercover mission to investigate the gang operating at the Happiness Rubber Plant to coerce female workers into prostitution. An indignant Kong joins hands with fellow worker Chow Mei-ha and factory head Wong Chi-kong to expel Blackie Kei whose ruthless and blatant exploitation of the workers has been going unpunished. Facing the loss of a lucrative source of income, Blackie and his underworld bigwig boss Wu Tin-hung intercept the love letters exchanged between Wong and the wife of the general manager Ting Yuk-lan and use the correspondence to extort money from the adulterers. The fearless Chow dons a maid disguise and ingratiates herself with the gangster, followed by a police raid masterminded by Kong to crack down on the notorious gang.

During World War II, spy Wu Lai-sheung is instructed by her superior Fan Yeung-shan to murder spy number 13 Cheung Chi-ping. While Wu establishes a relationship with Sakei, the assistant general of the Japanese army, she also gets acquainted with Cheung. Cheung and Wu fall in love. Wu recommends Cheung to become Sakei's driver. Cheung pretends to court the Japanese spy Siu-kuen, but Siu-kuen arranges to kill the spies contacting with him. Cheung has seen through Kuen's identity for long. When Kuen is going to kill Wu, Cheung kills Kuen, Fan compels Wu to kill Cheung. Wu follows the instruction to murder Cheung. After the murder, Wu disappears. After the war, Fan discovers Wu ends up in asylum. When he visits Wu, he tells her of Cheung's innocence. This breaks Wu's heart. Cheung turns out to have seen through Wu's identity for a long time and pretended to have been killed to cover up his identity and facilitate his work. With the truth known and the war ended, Cheung and Wu married.

A series of murders are committed after the victims are served with a Death Pass. Connie Chan Po-chu is the "Jane Bond" on the case!