A doctor is driven into an investigation of sinister goings-on at a horse race track by his mystery writer ex-wife.
A female police detective (Marsha Hunt) enters jail to gain the confidence of a shoplifter and learn the identity of the leader of a stolen goods racket.
Rejected by Law (Sheung-kwun Kwan-wai), ruffian Koo (Wong Yee) exacts his vengeance by making Law lose her job. When her father is injured at work, her brother Fai and boyfriend Tse resort to obtaining a loan. Koo even kills their creditor and frames the murder on Tse. Law and her brother sow discord between Koo and his mistress, eventually exposing their crime and leading to Tse's acquittal. While retaining her feminie elegance and charm in subtle details, Law resourcefully eliminates all the threats and dangers. Unlike other conventional detective dramas of Cantonese films, this film is filled with a sense of community and grassroot sensibility. Sheung-kwun Kwan-wai impressively demonstrates a great flexibility and versatility in her characterisation and performance of this female detective role.
The three heroines, Wong Ang, Wu Nga, and Heung At expose a murder case involving three dead bodies found in an old temple. Unbeknown to the trio, they've fallen in a trap laid by gangster Hui Pui-shing, who desires to avenge his brother's death by eliminating the women. With the cooperation of Hui's righteous subordinate, the police arrest Hui for smuggling tobacco and seizes their forged banknotes.
The Flying Dragon gang goes on a rampage and the police Inspector is at his wits' end. He then commissions Wong Ngung, Wu Ngar and Heung Nga to help him catch the gang members. Suet-ying, a young woman, is addicted to gambling and owes a huge sum to the gambling den that belongs to the Flying Dragon gang. She has even signed IOUs. When the younger sister of Ying's husband sees that Ying is weighed down by worries, she asks Wu Ngar for help. Wu Ngar sneaks into the gambling den, but her behaviour is suspected by the gang leaders, Tai-kit and Tai-hong. Fortunately, Wong Ngung saves her. To get back the IOUs, Ying falls under the control of Hong and Kit. Master Lung has evil designs on Ying. He first kills Kit and seizes Ying. Hong then shoots and kills Lung. Wong Ngung and her two partners get back the IOUs for Ying. They notify the police Inspector to arrest the members of the Flying Dragon gang. Hong is shot and injured by Wong Ngung. He is arrested with the other gang members.
The Diamond Gang commits a robbery. The leader Chiu Yee-kong wants to keep the booty and this arouses the suspicion of gang member Tai-wai. The police does not have a clue and thus invite Wong Ngung, Heung Ad and Wu Ngar for help. Kong is in accomplice with his third concubine. They order someone to steal the diamond and leave Wong's symbol. Wai turns his attention on Wong. Wong, Ad and Wu are not afraid of Wai and they throw him out. They sneak in Kong's apartment to investigate. Kong's second concubine is mad at Kong for neglecting her. She tells Wong the truth but gets killed. Kong's people surround Wong, Ad and Wu. Each of the three faces their enemy. Ad is tortured by Wai. Wong and Wu arrive in time and save her. One of Kong's people tells Wai the truth. Wai immediately attacks Kong. Wong, Ad, Wu and the police arrive at Kong's headquarter to arrest the gangsters. Wai is arrested but Kong has escaped. The diamonds are found. The inspector makes Wong, Ad and Wu as partners.
Detective novel fan Mimi Zhang has her photos taken at the peak by her brother Benda, an amateur photographer whose camera is nearly knocked down by a reckless man sprinting away. Zhang soon stumbles upon a murder. Officer Yang Ming has the victim's husband Cao Ren marked down as the prime suspect. Though being offered $10,000 by the wife's bereaved paramour, who remains anonymous, to testify against Cao, Mimi rules out the loving husband as the suspect. The developed pictures reveal a six-fingered handprint left at the scene. That very same night, the real culprit attempts to steal the negatives from Mimi, but fails. The following day Yang collects the piece of evidence on behalf of the police and accompanies Mimi back to the crime scene. There the six-fingered detective confesses to the crime of passion, pursuing the witness all the way to the top of a tower where she takes the dive and is saved by the police standing by on the scene.
Tse Mei-chen is deeply concerned about her only family, sister Bo-chen who is obsessed with perfecting her detective sensibilities. One day, Bo-chen returns home in panic to relay to her sister and her boyfriend detective Ma Tin-lung the horrifying murder of Siu-ying by her husband Tsui Kai. But a subsequent visit to the couple's, the cousin of Bo-chen's best friend Wong Kam-fung, proves the alleged crime false. Incognizant to all, the victim was Siu-ying's twin sister Kwok-ying, who bore witness to Tsui's misappropriation of their wealth for drug trafficking. Refusing to abandon the probe, Bo-chen is held up by Tsui. Deeply perturbed by Ma's investigation into his secret dealings, Tsui coerces Mei-chen to distract her boyfriend long enough for his escape. Refusing to bow to the threat, Mei-chen informs Ma who leads his squad to the rescue of the sister and arrests Tsui and his accomplices.
Female police officer Pak Yik-wah poses as a cleaner and works in a fitness centre to gather evidence of the trainer Henry Fung's criminal activities. In the company of sister Yik-mui, the detective attends the centre's anniversary ball where she meets and falls in love with Man Hing-cheong, a well mannered guest with an elegance about him. But Yik-wah is forced to quit when her conservative father Yau-yu finds out about her moonlighting activities. To help the crime leader Wu Hung evade the police, Henry hatches a plan to murder Yau-yu who, like the wanted man, has a mole on his sole. When the sisters come under attack from a mob of gangsters following Yau-yu's disappearance, Man arrives to save the day and reveals his undercover identity. The operative hot on the heels of Wu joins hands with the sisters and lays siege to the gangster's hideout in a heroic effort to rescue the hostage and wipe out the gang.
A female private detective, Harriet Zapper, is hired by a rich old man to find his missing children, and becomes involved in counterfeiting and murder.
When Harriet Zapper is hired to find the identity of Karel Duval, and the true heir to the Duval family fortune, a bloody trail of murders leads the Big Zapper from London to the South of France and into a hornet's nest of betrayal and death.
A female private detective goes undercover as a porno actress to find a millionaire's missing daughter.
A veteran detective loses his partner in a shooting while they are investigating a gangster who is controlling the local porno rackets. He is stunned to discover that the new partner he is assigned is not only a rookie, but a female.
A turn-of-the-century investigator named Kate Bliss goes to the wide-open spaces of the wild west to capture a gang of outlaws led by a charming "Robin Hood of the plains," leading a band of dispossessed ranchers against a stuffy English land baron who has cheated them out of their property.
A gang falsifies college degrees and sells them. They also help their careers, so that later they can blackmail them to obtain industrial espionage.
Lisa Ryder is a young policewoman recently promoted to detective when she has her first case in tracking down and identifying a serial killer in her small California town.
Mary Giordano is a bright, intelligent student who goes to a catholic school. She also has an addiction to mystery novels and detective magazines, which inspire her to do her own detective work. When she starts snooping around on the case of a murderer of teenage girls, it gets her in hot water with her mentor Detective Jerry Gunn. But it also starts a team up with police cadet Tony Campbell. The two work together to find the murderer. But the closer Mary gets to solving the murder, the more danger she puts herself in of being the next victim.
The murder of the ex-wife of Doctor Sam Charney (Rutger Hauer) leads Detective Della Wilder (Pam Grier) to uncover a series of women's murders somehow linked to a big pharmaceutical company.
A female detective investigates the case of a young mother whose infant left behind has died.