Kim Young-joo is a genius with an IQ of 200 and the youngest editor of a fashion magazine. Constantly embarrassed and ashamed of her mother's developmental disability and suffocated by her affection, Young-joo leaves home and runs away to get married. But after she gives birth to her own daughter and becomes a mother herself, Young-joo begins to see her life and family differently.
as Kim Young-joo
as Park Dat-byul
as Kim Sun-young
as Park Jung-do
as Choi Go-man
as Oh Chae-rin
as Lee Je-ha
as Oh Min-suk
as Oh Soo-hyun
as Kim Soo-Ri
as David
as Young Kim Young-joo
as Hong Yi-rim
