Ten years ago, KUNG CHAK-LAM, KUNG TUK-LAM and TSUI SHUI found a wishing rock after they had been saved by the masked klepht PEACOCK. They each made a wish, and agreed to meet again ten years later. TUK-LAM has grown up to be a lingerie street vendor, TUK-LAM a cross-dressing scammer, whereas SHUI has become a police officer. The thief that SUN CHIU-TUNG, who is the chief of a private detective agency, has been running after has slipped away. Her failure means that she is not entitled to the reward offered by the police. Her daughter, NGOK KAU, informs her that their landlord is coming over to collect their rent soon when she returns to the office. Sergeant LUI KING-CHAU is a typical bad guy. In addition to cheating TUK-LAM out of his lottery ticket, he threatens to unmask CHAK-LAM and appropriates SHUI’s gun. Tonight, coincidentally, CHAK-LAM, TUK-LAM and SHUI plan to kill CHAU……

Something strange happens to TUNG, CHAK-LAM, TUK-LAM and SHUI as they are being surrounded by the police. They are certified dead on their arrival at hospital. DIK HON breaks down at the news. At the morgue, CHAK-LAM, TUK-LAM and SHUI come back to life, and they believe they have already died. TUNG shows up suddenly and takes them to her detective agency. Back to her office, she reveals to them that she and PEACOCK are co-disciples. She also invites them to learn to be a private agent. TUNG finds LEE SING-NUI, CHAU’s wife, suspicious. NUI is a superstitious person. TUNG and the trio decide to set her up. TUNG learns by chance that CHAK-LAM and TUK-LAM are half-brothers and that their father is KUNG SUM-KAI. She is determined to take care of them for KAI’s sake. TUNG and the trio sneak into CHAU’s place, where they find evidence left by the murder……

CHAI confines KAU. He makes her work as his gang’s temporary accountant after learning that she is a mathematical genius. TUNG pretends to put the evidence in where she has been told. She tries to follow the culprit but to no avail. TUK-LAM manages to make it to a warehouse and fights off CHAI’s men. Now that the case has been settled, SANTOS revokes the arrest orders of the trio and resumes SHUI’s post. TUNG invites the trio to move in but they sneak away in the middle of the night. TUK-LAM’s grandmother has been hospitalized. He visits her, and discovers that she is not suffering from any terminal illness at all. He decides that he will from now on stand on his own feet and support his grandmother. With a view to repaying his debt, CHAK-LAM goes through a wall and steals money from a Mahjong house. SHUI sees the girl he likes on the street. He is so thrilled that he sings and dances on the street.

TUK-LAM intends to make a living as a kung-fu fighter. He gives an open challenge on the street. An enemy of his appears to make thing difficult for him. On the other hand, CHAK-LAM’s creditor has sent his men to deal with him. TUK-LAM and CHAK-LAM run into each other as they are hiding away from their enemies. Once again, TUNG shows up to their rescue and they finally agree to work for her detective agency. TUK-LAM and CHAT-LAM discover that their necklaces, which were given to them by their respective father, look very similar. HON encourages SHUI to run after his dream girl. A maid named SO FU-LE has fallen from a building. Finding the incident suspicious, her good friend MOU-SEE entrusts TUNG to look into the case. SHUI’s dream girl, CHOW KON-JAC, shows up at the police station. His excitement turns into disappointment when she scolds him for no apparent reasons……

CHAK-LAM and TUK LAM call each other son of a seductive woman. They want to move out. TUNG makes them change their mind with a trick. As told by TUNG, CHAK-LAM and TUK-LAM dress as maids to seduce WU TUNG, owner of Tung Tung Studio. Later, they return to the Spinster House, where CHAK-LAM discovers that one of the maids has the same hairpin as the one WU TUNG gave LE. Using the hairpin, CHAK-LAM and TUK-LAM make LE’s friends jealous of each other. The next thing they know, LE’s friends are fighting with each other. TUNG and the others study the files SHUI has brought home. There is something unusual about the files. JAC wants to take back LE and her friends’ photos. She is almost raped by WU TUNG. Fortunately SHUI, who happens to pass by, saves her. After spending some time in the Spinster House with each other, TUK-LAM and CHAK-LAM finally make up with each other. Together, they probe into the murder case of LE.