Murdered. Shot. Dead. Assassinated. Rose?

In Korea, people are getting killed because of these people. Whenever there is a death, a simple blank card and a rose is left behind at the scene. Nobody knows who these murderers are but the cops are working on it and they came to a conclusion that these skill fully murderers, or whatever you call it, are in fact…girls. Team 1 is the best cops in Korea and has been put on this case to solve. However, when they find out who these assassinators are; they get a shock of their life. These girls who team 1 is dying to hunt down can be a whole lot closer to them than they think.