Two girls with a twisted fate, born on the same day, Lee Eun Hee (Bae Doo Na) and Lee Keum Hee (Kim Yoo Mi) live their lives as sisters. Living a life of poverty with their family, kind and considerate Eun Hee sacrifices her educational chances to better herself for her older sister Keum Hee. Eun Hee's true identity unbeknownst to her, one day a wealthy older man comes to their home requesting the return of his long lost granddaughter. Due to an accident that caused the death of her husband, in spitefulness, the girls mother returns the wrong granddaughter to the older wealthy man and leaves the real granddaughter in a life of struggling and hardship.


Cast
    * Bae Doo Na as Lee Eun Hee
    * Shin Sung Woo as Suh In Woo
    * Kim Yoo Mi as Lee Keum Hee
    * Kang Dong Won as Min Ji Hoon
    * Kim Hae Sook as Kim Kil Nyeo (Eun Hee and Keum Hee's mother)
    * Kim Sung Kyum as Kim Hoe Jang (grandfather, Chairman of Tae Sung Group)
    * Lee Eui Jung as Kim Eun Soo (Eun Hee's cousin)
    * Lee Hye Sook as President Yoon Ji Sook (Eun Hee's aunt)
    * Jung Jong Joon as Kong Jang Jang
    * On Jo as Wang Kkot Yim (Eun Hee's twin friend)
    * Bi Ryu as Wang Byul Yim (Keum Hee's twin friend)
    * Hong Ji Young
    * Kang In Duk
    * Lee Se Young as Lee Eun Hee (as a child)
    * Park Eun Bin