"Mama" follows various characters as their touching stories all center around mothers. Won Jae contracts an incurable disease and can not walk. His mother Dong Sook supports his son by delivering yogurt. Seung Chul is a ruddy gangster, but in front of his mother, Ok Joo , he becomes a mild-mannered son. Meanwhile Eun Sung is busy taking care of her famous opera singer mother Hee Kyung who has unpredictable and haggard character.