Rookie detective Jeong-Min (Kim Dong-Wuk) finds difficulties with his new job. His boss doesn’t like him, he has to secretly prepare for a public service exam, and the local residents are up in arms over a serial killer that the police can’t catch. A protest is then organized in front of the police station by the local residents. To Jeong-Min’s horror, his own mother leads the protest as she works as the general affairs manager for the women’s association. The residents are particularly peeved that the serial killer is causing the value of their homes to drop. Jeong-Min then decides that he will catch the serial killer once and for all.
Four guys with nothing better to do decide to rob a gas station. When they find out there isn't as much money as they expected, they lock up the employees and take over to make more money. They don't know how to run the gas pumps, and when the customers complain, the guys take them hostage. Everything is more or less under a chaotic kind of control, until they order Chinese food and make the mistake of harassing the delivery boy. He rounds up a bunch of other delivery boys to attack the gas station. Another confrontation with a high school gang and the local mafia provokes a bigger fight. Finally the police arrive for the final showdown.