《A Killer Paradox》adapted from the webcomic of the same name《A Killer Paradox》is directed by director Lee Chang-hee of "Other People Are Hell" and written by the new screenwriter Kim Da-myung.It is about the theme of "Crime and Punishment", telling the story of an ordinary man who became a murderer due to an accident and the police who tracked him.

Choi Woo-sik plays the role of "Li Tang", an ordinary college student who kills people by chance, only to find that the people he killed were actually scum who committed various evil deeds. He is also called a "hero" and gradually gets involved in more and more affairs.among unexpected events.

Son Seok-kyu plays the role of "Jang Nan-gan", a detective who investigates murder cases. He has excellent intuition and instinct like animals. He wanders around Li Tang in order to investigate the case, and he will definitely investigate the case he is responsible for to the end.