Since their parents' death in a car accident, Jang-woo has taken care of his younger teen sister, Eun-ji. He watches over her almost too protectively. One night, Jang-woo goes out and when he returns he finds Eun-ji missing. Later, Jang-woo noticed a suspicious fellow lurking in the background. He gives chase. Shi-eun is an outcast, shunned and mocked by others. Her frayed personality is due to her overwhelming ability to see the deaths of others before it happens. Her heavy guilt leads Shi-eun to help Jang-woo in his chase.