What You would do if you lose your memories.. and you ask for help to wrong person? 

Myungsoo made ​​a big mistake when he was in high school. he is too keep her lover. and so many people that he was tortured just because the person is close to her lover.
at one point he had an accident. he lost some of his memories. he wanted to remember his past, someone he could not forget. but unfortunately he was asking for help to the wrong person