Kim Junmyeon was a normal person, who frequently loves reading book and listening to music. He never smiled, he was serious all the time, he travels alone but he never had thought about his past. He lived alone without knowing his own parents.

Few months ago, he car crashed by the truck and had no memories at all. He was empty, with a friend, Dr. Oh Sehun, who tried to help him out. Dr. Sehun offered him a loads of job but he preferred to work on a cafe.

But he couldn't avoid to ask himself? Who was he? Whwt kind of person was he? Who was his family? Who was his friends? And what if something out there made his heart beat and owns his heart? How would he know that if he'd lost his memories?