Detective Go Geon-soo is having a hard day, and the following events happen to him in less than 24 hours: He receives a divorce notice from his wife. His mother passes away. He and his coworkers are investigated by police inspectors over alleged embezzlement. Then on his way to his mother's funeral, he drives recklessly and commits a fatal hit and run. He tries to cover-up the accident by hiding the man's corpse in his deceased mother's coffin. But someone has been watching all along, and Geon-soo gets a mysterious call from a person claiming that he was the sole witness to the crime, who now begins to threaten him.
I expected A Hard Day to be very lackluster and uninspired, but were surprised at how enjoyable it actually was. Even funny sometimes. Sure, there's not a whole lot of originality here, but it delivers a momentarily rush and the excitement rises by the minute. Not a perfect thriller, but still worth your time.