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.

• Kim Hyun-joo
• An Seo-hyun
• Ha Hee-ra
• Kim Tae-woo
• Shin Hyun-jun
• Yoo In-young
• Kim Jeong-hoon
• Kim Ha-kyoon