Esprit d'amour

Koo, an insurance investigator, is sent to make enquiries regarding a case of accidental death. He is surprised to learn that the victim is the same ghost who has spoken to him the night before. Koo is fascinated in working on the case. One night, Yu's spirit appeared in Koo's apartment. Her beauty and pleasant personality intrigued Koo. They get involved into a romance between man and a spirit. Will Koo and Yu be reunited or will Yu remain, as always, Koo's esprit d'amour?