Kim Su Jin, a 27 year old fashion designer, is dumped by her lover. Feeling a bit depressed, she decides to start a new life and goes to buy a drink from convenience store where she meets this handsome man. She goes back home and pleads forgiveness from her father and then everything starts going uphill. Kim gets a new job and is living like a normal young woman. Then she meets the mysterious handsome man again and falls in love with him instantly. They start dating and even get married. They live a happy life until Kim starts forgetting a lot of things such as, where she lives. Soon it is found out that she has Alzheimer's disease and this makes their life go downhill. The rest of the movie we watch how their relationship is about to fall apart because of the disease that struck Kim. Will Kim's love towards this mysterious man wither because of the disease?