Taechyd is a young, unafraid of risks of police, an accident to his wife and her children away from him, he is left alone. After the friend sirang resort in until he meets a mysterious girl siengsai, his life changed. He is the siengsai can only rely on the people, and only he can see siengsai body, she who, in the end where it comes from? Beautiful cute siengsai like a shadow, and really exist, in dependence and dependence between, between the support and help, Taechyd fell in love with this mystery girl, and decide what kind of help her unlock the mysteries of the siengsai in the end with the story, she and Taechyd love what the result will be, in the end and what will be the outcome.