beating   convenience store   serial killer   police corruption   call girl   prostitute   dismemberment   female nudity   gore   aquarium   hammer   graphic violence   impotence   golf club   based on true story   stabbed in the stomach   one day   decapitation   interrogation   pimp   wife beater   disappearance   social commentary   antihero   tragic ending   police protection failure   bludgeoned to death   ex cop   chisel   disgraced cop   seoul   sledgehammer   escape from island   recorder flute   remote island   wife kills husband   murder   brutality   foot chase   one word title   revenge   violence   severed head   rape   sickle   race against time   death of daughter   stepfather stepdaughter relationship   victim   stabbed in the neck   childhood friend