*A Hard Day* is a 2014 South Korean action thriller film written and directed by Kim Seong-hun.
The film stars Lee Sun-kyun as Detective Go Gun-soo, who finds himself in a dire situation after accidentally hitting and killing a man while driving home from his mother's funeral. In a desperate attempt to cover up his crime, Go decides to dump the body in a coffin alongside his deceased mother. This decision sets off a chain of events that escalates into a larger nightmare, involving a mysterious and dangerous man portrayed by Cho Jin-woong.
The film received critical acclaim for its unrelenting suspense and clever blend of humor and tension. It debuted at the Cannes Film Festival, where it garnered positive reviews for its gripping narrative and strong performances. Upon its release in South Korea, *A Hard Day* became a box office success, quickly surpassing its production costs and grossing over $24 million by the end of its theatrical run.
The film's engaging plot, combined with the performances of its lead actors, has made it a standout entry in the South Korean thriller genre. Its clever storytelling and stylish direction have not only captivated domestic audiences but have also led to several international remakes, highlighting its universal appeal. Overall, *A Hard Day* is recognized for its impact on the thriller landscape, showcasing the complexities of morality and the consequences of one's actions.