This is another really good South Korean action and martial arts film. It is clearly modeled after the John Wick style of films. Its protagonist is a likable but deadly man of few words that gets dragged into an international sex trafficking ring to save a teenage girl in his care. Great acting. Great and violent fight choreography. Visually exciting. It moves from the first moment to the last. I understand this is based on source material; however, I am unfamiliar with it and I don't think it hurts the experience any. I would watch it in Korea with Subtitles to get the best experience. This is Korean film making at its best.