Maria is a medical student and works part time at a DKNY store, which happens to be right in front of the world famous SM Entertainment building. On the way to work one day she accidently falls on top of Key from SHINee. Each day before work they sit and talk to each other before getting off at the same bus stop. After Maria goes missing, Key realises that he has feelings for Maria... and that their past is not what some people would call normal..

What happens when a North Korean spy meets a famous idol? What happens when they slowly start falling in love but it interferes with both their careers? What happens when a lover realizes the person he loves does not exist, and has been faking from the beginning?