As a child, Priscilla Wong was teased for her ugliness. After an accident that required her to have plastic surgery, she firmly believes that beauty can change lives. Even after she enters the police force, she still cares about beauty more than anything. When a prostitution case reveals that a loan-shark company is operating inside a public housing community, Priscilla and fellow CID officer Edwin Siu are sent to act as a couple in order to obtain information from the housewives. They meet the "Housewives Trio" of Mandy Wong, Kaki Leung and Rachel Kan. To investigate the case, Priscilla is forced to give up her fancy wardrobe and cater to the housewives. She inadvertently picks up some housewife habits. Meanwhile, Edwin's cover as a technician earns him the nickname of "Sewer King" and many admirers. This makes Priscilla jealous, despite her crush on the popular guy at the police station (Hugo Wong). As Priscilla and Edwin argue their way through the case, they slowly develop feelings for each other. At the same time, they discover that the Housewives Trio are acting suspiciously and zero in on them as suspects. Suddenly, the appearance of a mysterious woman causes a big change to the case and everyone's relationship becomes increasingly complex...