Kang Soo Hyuk and Han Chae Hee used to be a happy married couple until they decided to split up later after. Three years later, he gets a call telling him that he just received a house, his ex-wife Chae Hee's house. He then finds out that she is dying from a terminal disease and she doesn't have much time left before her death. Chae Hee, who was waiting for her death to come, Soo Hyuk struggles to try and save her. He discovers some old polaroid pictures in the secret attic that lets him time travel back to the past and discovered why he fell for her back then. But traveling back to the past may risk his life to discover what he had lost.