- HD 1080
- Runtime: 111m.
- Status: Released
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- Languages: ko
- Country: South Korea
- Director: Kim Seong-hun
- Stars: Lee Sun-kyun, Cho Jin-woong, Jeong Man-sik, Shin Jung-keun, Shin Dong-mi
- keywords: police, funeral, gangster, anti hero, hit-and-run, murder, organized crime, police corruption, police inspector
- Production_studio: Dasepo Club, AD406
- Slogan: The war for a dirty secret.
- The A Hard Day is featured in the top rankings of 2014
- #17 in Top Crime Movies of 2014
- #18 in Top Thriller Movies of 2014
- #6 in Top Mystery Movies of 2014
After trying to cover up a car accident that left a man dead, a crooked homicide detective is stalked by a mysterious man claiming to have witnessed the event.