It seems like this movie attracted some negative reviews but I have to say that it has several major positives. The dynamic with the deaf women was unique and a well positioned angle. We got to experience the stamina and courage of someone who is often marginalized by society. The women here were strong positive role models- our main female lead risked her life for others. The two female leads are very cute in a down to earth right kind of way. Suspense and action were good. Serial killer was mostly annoying and crazy which would be consistent with the profile. Now some cons or simply other sides. The police are behaving in really unusual ways, from the very first scene. I don't know enough about Korean police but it seemed unlikely. The security guard took a very unusual decision at one point. And among all the action, no one seemed to engage in any analytical thought process. Lastly I wonder if the crowd's inadequate reactions were a form of social commentary. The movie may not be the best of a kind but is still solid with very good performances.