Don't Worry, I'm a Ghost: Moon-Ki (Bong Tae-Gyu) is involved in an accident and wakes up in the hospital. When he awakes, he can't remember his own name, family members or where he lives. Through fingerprint checks, he learns that his name is Moon-Ki and his address. When he goes to his home, Moon-Ki feels strange in the unfamiliar home. Moon-Ki then wakes up in the middle of the night and sees a woman (Park Shin-Hye) looking down on him...