Товч агуулга:In his prime, Byeongsu was one of the best murderers around, spending years obsessively trying to perfect his technique, only killing in the pursuit of artistry. And then he gave it all up to be a dedicated father to his adopted-daughter, Eunhui. Now though, suffering from the onset of dementia, he decides to come out of retirement one last time and for one final target: his daughter's boyfriend, who he believes is a serial killer just like him. After all, it takes one to know one.
