What is the chance of meeting a girl in wedding dress wearing sneakers in a subway? Huisun is a webtoonist who is out of ideas. That's when she meets this girl who seems to have a story! The unlucky girl Bogyeong thinks that her husband-to-be ran away because of her and everything that happens to people around her is her fault. But she is so curious this time. She wants to know why her husband-to-be ran away. She doesn't want to blame herself or him without knowing the reason. So she goes to look for him but she misses the last train, she doesn't have any money for taxi. Then a somewhat kind-looking guy asks her where she's going. How long will he keep following her?