Jeong Yihyeon is a genius, but she suffers from psychogenic amnesia and does not remember her husband and young daughter. Hong Gyeongdoo is uneducated and poor, but he's a loving father to young Hong Haedeum, who's inherited her genius from her mother. Yihyeon and Gyeongdoo met just as both were on the brink of suicide, and they'd decided to choose life together. The drama is about Yihyeon's journey to putting together the pieces of her lost memory with her husband's help, a man who seems completely unsuited for her.