Bowie and Fanny run a hair saloon in Shenzhen. Customers Wah and Chun want to chase Fanny. One day Fanny was murdered in the saloon. Wah and Chun are arrested as murder suspects. A police officer, Angie, works as undercover in the saloon and she lives with Bowie. Angie is charming that attracts a lot of customers. With this advantage, she takes related information from the customers. A rich guy Fai and a barbarous guy Ho want to chase Angie that they always have fight. Chun is released because he has evidence to prove himself is somewhere else when the murder happened. Chun tries to date Angie too. There are some other suspects on this murder case. Bowie alerts Angie not to trust the men, and he cares about her very much.
Fai and Ho invite Angie to a nightclub, but they have a fight during the date with Angie. Ho was murdered at that night. Fai becomes the prime suspect. Chun gives Angie a necklace to show his love, but he refuses to disclose anything about Fanny. He seems has difficulties in telling the story. Bowie is very upset about Chun, and tells Angie not to trust the one who flirt around. Bowie makes joke about marrying Angie. Madame Fok's daughter Mei Ling is lost, she asks the police to find her daughter. During the investigation the police finds out that Mei Ling worked in the saloon and stayed together with Bowie too before she is lost.
At the same time, Angie discovers her lost necklace at Fanny's room. While Angie wants to report this incident to the police, her face is covering by a tranquillizer handkerchief...