On his way back from a seminar, Jun-young witnesses an automobile accident. Among the victims are his daughter Eun-jung and another young woman, the spouse of an ambulance driver named Min-chul. Jun-young and Min-chul get caught in a temporal loop.
A newcomer to film directing, Cho Sun-ho (also the co-writer of the web-toon Deo) starts with a bang, with this thrilling take on Groundhog Day, that doesn’t just mimic its model, but plays with the laws of the genre and injects many moral issues and a serious reflection on mourning. Korean viewers were not mistaken when they made A Day a surprise hit.