Jacky and Mary are new representatives of female police officers in the 1990s; they are cheerful, proactive, emotional, and witty. In the face of a real world filled with crime, their belief in justice remains steadfast, and they do their best in every situation. They unwittingly get caught up in a jewelry heist, and one of the robbers, Cao Ming, along with Xu Dongsi, is hunted down and killed one after another. The two encounter Cao Ming's sister, Cao Hong, but she avoids them at every turn, raising their suspicions and further motivating their determination to investigate. While Jacky and Mary are monitoring Cao Hong, they discover that her boyfriend, Xu Dong, is connected to the murder case. The unfortunate young couple must evade the dangerous criminal Ding Jiu's pursuit while also finding a way to shake off Jacky and Mary. It turns out that the jewelry store owner had betrayed Ding Jiu and others to commit the robbery in order to claim the insurance money. When the robbery fails, the owner decides to eliminate all the robbers to cover his tracks. The owner also uses his charm to blind Jacky to the investigation, leading her to unknowingly put Mary, Xu Dong, and Cao Hong in danger. Just as a fierce gunfight ensues, Jacky arrives just in time to capture Ding Jiu. In a bid to protect himself, Ding Jiu incriminates the owner as the mastermind behind it all. As the police close in on the owner, who is already disgraced, he is searching for Jacky and Mary to take revenge.