Chul-woong, a high school teacher, had lost his fiancee to a tragic murder case just before their wedding. 10 years have passed, but he is still haunted by painful memories.
Sang-won, the police detective formerly in charge of the case, is still dedicated to solving crimes than climbing the ladder, and is a devoted father to his only daughter Jung-hyun.
One day, Chul-woong enters Jung-hyun’s life when he becomes her teacher, and Jung-hyun start having feelings towards him.
