I saw where this movie could have gone and things they could have done differently, but you could say that about almost any film.

It starts out unclear exactly what In Ae went into prison for considering the opening scene and was hard to invest in her character and story. But we cling on to the revenge aspect knowing what her sister has been through as we see it unfold in the film. Her sister on the other hand who had a lot of character development was well written. There were a lot of loose ends and no real "revenge/justice" for those who wronged Eun Hye. They all got off basically Scott free other than a few broken bones and busted lips, you may think that's harsh but considering what they've done, its nothing in comparison.

The production of the film is quite good, the actors who played evil characters did a very convincing job. Truly making us hate them and want them to get everything they have coming ( although in my opinion it wasn't enough). The action and fighting scenes were well done Lee Shi Young is never disappointing when it comes to that. the cinematography takes some interesting angles, adding to some scenes. The minor but important characters had some strange contradicting moments which were confusing and if done differently could have added much more ( the well dressed mean girl in the brothel who suddenly became obedient and dressed childishly, and the man in the suit who suddenly changed his mind).

Even with the jumps in the "logic" and having some confusing story choices it didn't cause the story to lose too much. I wasn't able to become fully invested in the story and characters but it still isn't an awful film.