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