The film's plot is about a policeman putting together a team of imprisoned criminals who were once good at their job to catch bad guys, in return for decreased jail time.

The storyline is simplistic and quite predictable and the movie starts out slow when introducing the characters and their backstories. The characters at some point can be annoying especially the lady No-soon. The action and fight sequences are fantastic, and fun to watch but they're very far-fetched especially toward the climax where they take on at least a hundred henchmen. The villains are clichèd but are terrifying and threatening enough so that does the job. The cinematography is good; it captures the intensity and struggle of the fight scenes well with some close up and long shots. The soundtrack and effects are satisfactory. And the performances are all good.

All in all, there's nothing refreshing about Bad guys, but if you're in for entertainment, you're surely be entertained. 6/10.

4 good criminals (with barebone personalities, but different from each other) working on a case for reduced sentence. Your standard gritty cop-action movie. The action is decent at the "climax".. but aside from that, there is not much to look forward to. It's not that it is predictable, but because it's been done to death and this one doesn't really have fun with it. There are no big set-pieces, revelations or twists or anything. Everything goes smooth until it is resolved.

I believe this might be a series.. ? But it works fine as a stand alone movie of cops vs scum.

Take it or leave it. Wouldn't recommend and won't watch ever again. Probably will forget it tomorrow.

This isn't a refreshing movie, doesn't have uniqueness. The story about 4 criminals who has been offered to join a project to find out a criminal and if they are able to find out, their sentenced will be reduced. So, they joined with police for finding out them. And, soon they find out the police head is involve with the gang who is testing drugs on Korean's young people..