Starring Song Kang-ho, Shin Ha-kyun, and Bae Doona, the film follows an ill-fated kidnapping of a wealthy man's daughter, leading to a path of vengeance.

After he loses his job, Ryu contacts a group of black market organ dealers to exchange one of his kidneys as well as 10 million Won for one that his sister can use.

Upon returning home with the ransom money, Ryu discovers that his sister learned that Yu-sun was kidnapped and, not wanting to be a burden any longer, killed herself in the bathtub.

After Yu-sun's body is discovered by the authorities, a deeply mournful Dong-jin hires the detective on the case to find her kidnappers with bribe money from selling his company and house.

The detective finds Ryu's sister note on Yu-Sun and searches their apartment but the place is abandoned and they cannot link the murder.

Dong-Jin visits the radio station and sees a painting that Ryu has sent along with the letter depicting his sister's burial and Yu-Sun's death.

Ryu, armed with a baseball bat, locates the organ traffickers, murders them, and eats their kidneys to avenge his sister's death, receiving a stab wound in the process.

The website's critical consensus reads: "Though Park directs with stylistic flair, this revenge thriller is more excessively gruesome than thrilling.

[4] G. Allen Johnson of the San Francisco Chronicle called the film "a waste", referring to it as "so bloody, scatologically violent and consistently shocking, [that] it seems to have no larger purpose than itself – which is pretty grim.

[8] The Guardian's Peter Bradshaw gave the film a score of three out of five stars, calling it "deeply twisted and bizarre" but noting its "weirdly nightmarish conviction.

"[9] Wesley Morris of The Boston Globe gave the film a positive review, calling it "a pristine-looking movie with astounding framing and a deftly handled sociopolitical bent", and concluding that, "despite the coldblooded killing and trail of the dead, Mr. Vengeance feels warmly suffused with life.

[13] Brian Tucker was attached to write the screenplay, to be produced by Lorenzo di Bonaventura and Mark Vahradian, in a team-up with CJ Entertainment.