It's no definitive masterpiece but it's damn close.

Don't listen to the negative reviews

The plot isn't so bad, but the pace of storytelling is too slow which makes people bored. Certain moments are so obvious and unnecessary for the main plot. I would've fast-forwarded those moments if it was an online streaming. The ending looks like implying a sequel, not sure if this movie will get one

Strong acting helps the film overcome an uncertain premise and create characters that hold our attention absolutely.

Eun-A has a loving family, she's creative and happy go lucky. Unfortunately, she and her daughter cross path with serial killer who tracks them down and kills her husband and daughter. Severely beaten and left for dead Eun-A miraculously survives this savage attack, and now the only thing that keeps her going - mentally and physically damaged - is a dream of revenge.But, handicapped and weak she can't pull this off by herself, so she decides to gather a group of outcasts, each one with a specific skill to find the killer, each of them having one thing in common: members of their family (daughter, mother, wife) are on organ transplant waiting list. She gives them the proposal they can't pass on.At first none of those people trust one another, but having heard Eun- A's story they finally break, and agree to help her. And so, five ordinary people, heavily burdened by their personal problems and tragedies team up to catch sleazy, skillful and psychopathic murderer. In the edge-of-the seat cat and mouse game which will keep you emotionally engaged while rooting for this bunch.Hard to believe this is Jung Yeon-Sik's first feature, it's directed with skill and confidence, production is top, as expected for revenge thriller, genre that surpasses other Korean cinema output in production values and popularity overseas. As per usual, we have the full package here, film contains action, comedy (provided once again by lazy and incompetent law enforcement officers), lots of violence, drama, mystery. Lovely Kim Sun-A (Eun-A) is the star of this film as tragic heroine but the whole cast did a convincing job, especially robust and likable Ma Dong-Seok (Azooma, The Flu). I have to give props to our antagonist, chilling, cold, demented, teen idol type, On Joo-Wan as Jae-Wook, pretty boy killer, a rising star artist. With a dark secret and specific "artistic" vision that cost people their lives. And Park Hyo-Joo (Hye-Jin) good Samaritan, Eun-A's tragic friend and sidekick, comedic relief with small, but touching role.Excellent, engaging film, real emotional roller coaster, highly recommended.