Go Eun Sung's life is similar to Cinderella's. After her father died, her step-mother, Baek Sung Hee, took away all of her assets and her younger brother, Eun Woo, suddenly disappears without a trace. Despite this, Eun Sung preservers and works really hard to fulfill her dreams. When the CEO of a food company, Jang Sook Ja, suffers amnesia and can't remember who she is Eun Sung takes her in. However, Eun Sung does not know that she is the grandmother of Sun Woo Hwan, the man who she switched bags with at the airport. How will their constant bickering lead them to realize that they care more about each other than they let on?

Cast
    * Han Hyo Joo as Go Eun Sung
    * Lee Seung Ki as Sun Woo Hwan
    * Bae Soo Bin as Park Jun Se
    * Moon Chae Won as Yoo Seung Mi

Extended Cast
    * Kim Mi Sook as Baek Sung Hee
    * Min Young Won as Lee Hye Ri (Eun Sung's friend)
    * Yun Joon Suk as Go Eun Woo
    * Jung Suk Won as Jin Young Suk (Hwan's friend)
    * Han Ye Won as Sun Woo Jung
    * Ban Hyo Jung as Jang Sook Ja
    * Yoo Ji In as Oh Young Ran (Hwan & Jung's mother)
    * Kim Jae Seung as Lee Hyung Jin
    * Son Yeo Eun as Jung In Young
    * Choi Jung Woo as Park Tae Soo
    * Lee Seung Hyung as Pyo Sung Chul
    * Jun In Taek as Go Pyung Joong (Eun Sung's father)
    * Baek Seung Hyun as Manager Lee Joon Young
    * Park Sang Hyun as Park Soo Jae
    * Tae Hwang as waiter