It's the street of a newly planned city that is surrounded by rows of apartment buildings everywhere. Ji-Soo is a woman in her early 20s who's on her way home late one night. Even though it's rare to find any traffic at this time of the night, it's especially lacking in any form of transportation passing by. As she is about to arrive at the crossing by the hill, she hears a screeching sound of a car stopping suddenly followed by a thumping sound, indicating an obvious traffic accident. When panicking Ji-Soo arrives at the scene of accident, the car is already gone and there lies a kid and a woman about the same age as she is, both covered in blood.