Please don't watch a movie like this.This is such a disturbing movie.No person deserves a fate like this.Revenge of this kind shouldn't be encouraged.From oldboy to this movie,Koreans continue making psychotic movies that give no visual entertainment to people who watch it,instead makes them lose their sleep for days.This is not brilliance.These directors have come to a point where they will show anything on screen to surprise the audience under the mask of thrilling/suspenseful/twist endings.They don't think about the disturbance it delivers to the audience.If you really wanted us to be happy,you should have made us believe that the protagonist deserved that revenge inflicted upon him and not end it like this.Those who don't want to ruin their sleep,please don't watch this movie.The rest of the sick psychos can continue giving 5 stars for this pathetic excuse of a movie.