Song Jieun lives in a world where she's constantly running away from her past life and Park Geun Ee-- her ex-boyfriend. But why is she running from him? Her traumatic past with him can only make one wonder how she survived all the events that would have made a person kill themselves afterwards. With the help of her older sister, Jung Hana, the two of them escape to Seoul City to start a new life and get back on track in their lives.

On the other hand, Park Saejoon is trying to get over his disturbing past by staying out of love. He's afraid to fall for another woman after what's happened to him. His friend Son Dongwoon and sister Park Subin both attempt to help him rebuild his life by encouraging him to go back to school and get his GED.

The both of them, escaping from a life they wish they never knew, find a strange click inside each other that they can't describe. But will sparks be able to fly if their pasts keep haunting them?