A "cop buddy" movie with 2 good female leads instead of males. I enjoyed seeing the development of Jang Young-shil as the "part timer" that had a lot of different skills that came from all of her failed attempts at getting a good job but which lead to critical skills in the undercover work that she accidentally got into. Na Jung-an was just an out and out psycho in the frequent fights she got into. Loved those fight scenes, even when she lost the fights occasionally.
A good movie which left me hoping for a reprisal of the two main roles. The men were pretty much forgettable in their roles, this was a movie about 2 women. Jang Young-shil grew into what she was supposed to be, and Na Jung-an became better for being around Jang Young-shil.