Gang Nam-soon (Lee Yoo-Mi) has superhuman strength. She went missing as a kid in Mongolia. Now as an adult, she comes to Gangnam, Seoul, South Korea to find her parents. She finally meets her mother Hwang Geum-Ju (Kim Jung-Eun). Her mother is a wealthy woman and is a resident of Gangnam. After she lost her daughter, Hwang Geum-Joo tried to find her daughter and she also tried to live a righteous life, obsessed with doing good deeds. Gil Joong-Gan (Kim Hae-Sook) is Hwang Geum-Ju's mother and Gang Nam-Soon’s grandmother. The grandmother and mother were also born with superhuman like strength like Gang Nam-Soon.