Late one night a man throws himself in front of a subway train operated by a man named Yeong Joo. At that very moment Yeong Joo becomes overwhelmed with guilt and is reminded of a painful accident back in his army days. A man walks into a club where a woman named Yeong Joo is working. The man reminds her of her old lover. These two juxtaposing love stories, which eventually connect with each other, show us the cyclical relationships of giving and receiving pain.