Jin-soo (Lee Jung-jae) works as an anchorman for the local weather channel. After a car accident, he develops a curious case of selective amnesia. He finds clues of a past relationship, and finally decides to search out the identity of the woman he loved, with the help of friends and past acquaintances. Yeon-hee (Jang Jin-young), herself trying to erase and forget the memories of a love she once had, seems to be the only one who's helping him seriously.