In coma for a decade, the twin So Yeon wakes finally up. But she can’t recall many things. Her other twin sister, Hyo Jin, died in the accident that led to So Yeon’s coma. Now that So Yeon has gained her consciousness back, strange things start to happen.

A young man, whose only possession is a motorcycle, spends his time riding around the city looking for empty apartments. After finding one, he hangs out for a while, fixing himself something to eat, washing laundry or making small repairs in return. He always tries to leave before the owners get back but in one ostensibly empty mansion he meets the abused wife of a rich man and she escapes with him…