A Day is a 2017 South Korean mysterythriller film directed by Cho Sun-ho. The film starring Kim Myung-min and Byun Yo-han, revolves around a father who commits an unethical act in an attempt to save his daughter's life. Three years later, his actions return to haunt him, trapping him in an endless time loop.[2][3] It was released on June 15, 2017.
Plot
The story starts with a doctor, Kim Joon-young, returning home. His daughter, Eun-jung, dies in a car accident on the same day along with another woman. Kim Joon-young wakes up in what looks like the previous day. He tries to save his daughter but fails, with the day repeating over and over again. The woman's husband also experiences the day repeatedly. They cannot seem to save their loved ones no matter what. Later, they find out that the father of a child whose heart was transplanted without the father's consent and the man who had caused an earlier accident are the two persons whose day is repeating, along with the child father, who is seeking revenge by killing their loved ones. They reconcile to the father after learning that his child's heart is inside of the daughter. Thus, the daughter does not allow his father to die so they save him so that everything returns to normal. The doctor explains the transplant to the press as the movie ends.[4]
The film inspired a South Indian political drama movie Maanaadu, in which the protagonist is stuck in a time loop leading to a political assassination.[citation needed]