Yoon-Hee (Kim Hyun-Ju) and Tae-Hee (Kim Ji-Ho) are sisters whose fates intertwine in the most surprising ways. The two girls were tragically separated as children. They never found each other again, and Tae-hee fortuitously went on to a life of luxury and privilege. But she is still tormented by her little sister's disappearance.

Meanwhile, Yoon-Hee suffered from amnesia and gained a new name and a new sister, the spoiled Sung-Hee (Kim Min-Sun). Two romantic suitors enter her life: the mysterious Jae-Hyuk (Han Jae-Suk, All About Eve, Four Sisters) and the devoted Chul-Woong (So Ji-Sub, Something Happened in Bali). But when Tae-Hee finally reappears, the two sisters inevitably become rivals.

Will love reign supreme? Will justice be served? Will family ultimately prevail? Glass Slipper takes you on an amazing journey into the heart of life's most important lessons.