You are a woman who works as a detective, but you are very different from your other co-workers, you have a talent that some people in this world cannot have, which is seeing ghosts. Since childhood until now, you have been used to seeing various types of ghosts, from scary ones to those that look like living humans. You were used to it at first, but because some of them always asked you for help, you started to pretend to have a life like a normal human who couldn't see them.

At first it went well, but one day you had to solve a murder case of an elderly person in Gangnam. For a week you went to the crime scene and started investigating, because of that you always met a ghost that looked like a human. He is handsome and tall, and who would have thought he helped you solve the case.

He helped you quite a lot. Until, one month later. The case was solved, and the most surprising thing was that you found the suspect's fingerprints on the victim's body, after it was revealed you found out who the suspect was, he was Park Junseo, the serial killer who didn't look at the victim. He already had 5 murder cases in Gangnam, but what surprised you even more was that the ghost who helped you solve this murder case was him. You also didn't know, he secretly liked you, but fate said otherwise.

"I can't be with her, heaven and earth don't allow me to be with her because this is my punishment." he muttered as he watched you from a distance, his heart ached... it ached for you.