In the waiting room of a hospital in the afternoon with sunlight filtering through the trees, a man and a woman strike up a conversation by chance. - A woman's heart flutters as she waits for her doctor's appointment to see this refreshingly nice young man's casual attentiveness. - The next place the two met by chance was in an elevator in the same apartment building. - At that moment, the elevator comes to an emergency stop! - ! - What happened to the two men and women who were suddenly locked in a closed room?