Chu So-Ngo never took her job seriously. She works leisurely behind the desk at the police station waiting for the day to end so she can go home to her loving husband and obedient young son. Her job at the police station is just for her to kill time and make spare money for her to spend. However, things took an unexpected turn when her boss's wife thought So-Ngo was having an affair with her husband and had her transferred to the Patrol Unit. Soon she also learns her happy marriage is not as perfect as it seems when she finds out her husband has a kept mistress up in Mainland China and plans to divorce her so he can marry his pregnant mistress. No longer living carefree, So-Ngo has to worry about paying the bills and taking care of her son by herself. She decides to switch for desk duty to on the beat duties because of the better pay. As a beat officer she gets to know Senior Inspector Chan Siu-Sang better. The two have an close friendship and soon starts developing feelings for each other, but their relationship is put on hold when her ex-husband wants her back. Chan Siu-Sang's niece Chan Sam-Yuen, is a tomboy who has always dreamed of becoming a cop like her uncle. Since she is so active in her job her superior Ching Fung writes her up for being to ambitious and unruly. Chan Siu-Sang being more senior than Ching Fung decides to stand up for his niece and tells Fung to be a better superior instead. While always bickering with each other Sam-Yuen and Fung soon find out they also have a lot of the same interest. When Fung's girlfriend breaks up with him for neglecting her he soon starts to fall for Sam-Yuen. Later when Siu-Sang is framed for a crime he didn't commit will Sam-Yuen arrest him or let him go so he can find evidence to bring the real culprit to justice.
