Mina is a 23 year old girl who encountered an incident when she was younger.After a year she started seeing ghosts and all her freinds started to distant themselves from her.Two years later know living alone in a small apartment she meets a guy named Baekhyun who is a detective and is currently working on an important case once he learns about her secret he asks her for help in figuring out the case and she agrees. But they soon fall in love with each other... What will happen to them and the case?