This is a melodrama romance revolves around Lee Jung Hoon (Kim Dong Wook), a man with hyperthymesia with a condition that gives people the ability to remember an abnormally vast amount of their life experiences in vivid detail, and Yeo Ha Jin (Moon Ga Young), a woman who has forgotten the most important moments of her life. The two people with similar scars fatefully cross paths one day and come to love each other.