The movie starts with a lot of suspense and you try to figure out exactly what is going on scene-by-scene. You immediately see and understand the friendship between the two female leads and how it's not exactly what it seems on the surface. There are a few hard to watch scenes that definitely puts it in the thriller genre and the acting too is great. My only qualm with the movie is that the ending is too ambiguous because some of the things the lead does are left unchecked so there is no satisfying end to her horrible actions. However this movie had me glued I couldn't take my eyes off of it. I enjoyed every second plus I'm a fan of Shin Mi Ah.