Young-il, leads a murder-for-hire organization that manipulates their victims to appear as accidental deaths. Young-il struggles after the tragic death of his partner and friend, "Unbalanced Eyes," who has been with him since childhood. Young-il, now works alongside his long-term coworkers Jackie, Wolcheon, and new Jomman. They are asked to assassinate the prosecutor general candidate but despite the careful preparations, an unexpected accident jeopardizes the operation. Some flashing lights sequences or patterns may affect photosensitive viewers.