Life After Death (1982)

Prior to his world title match, In-du dies in a car accident. When his spirit reaches the afterworld, they send him back to the real world because it's not his time yet. In-du is reborn as President Choi Mun-oh who was poisoned by the executive director Sam-ryong and his wife Chun-sim. When the resurrected President Choi suddenly starts to box, Sam-ryong believes that President Choi knows of his plotting and is trying to kill him.