She is the owner of Lady Castle, and lost her parents in a plane crash. Hye-na makes every effort to throw him out from the Castle, but Dong-chan refuses to budge. As a consequence of this he makes Hye-na do community service, kidnaps her, and appears in front of her as the new household manager. Kang Hye-na ignores this and just drives straight into his truck.

He chases after her and eventually cuts her of at the end of a road. She drives away although Dong-chan isn't satisfied. She refuses to apologise but just gives him money. She knocks out a bunch of flowers from his truck so Dong-chan goes to complain. Hye-na is strong-headed and selfish, whose world revolves around her because she could not experience the warmth of a family whilst growing up.One day, she comes across Dong-chan when she is carelessly driving and knocks into Dong-chan's truck in which he is shipping flowers. Hye-na's parents died from a plane accident and her grandfather brought her up.

Kang Hye-na, the only successor of Kang-san Group, is the owner of the ‘Lady Castle’ and lives a ‘princess-like’ life with her servants. Menjadi satu-satunya penerus perusahaan konglomerat terbesar, Kang San Group, Kang Hye Na memiliki penampilan dan latar belakang. My Fair Lady – My Fair Lady Sub indo berkisahkan tentang Dari ‘selebritas panas’ kelas atas yang kaya dari kalangan atas di Korea, Kang Hye Na adalah yang diinginkan oleh para pria, ditakuti dan dibenci oleh para wanita.

Kang Hye Na yang merupakan seorang wanita yang memiliki perusahaan besar yang diwariskan oleh kakeknya saat meninggal.

Drama my fair lady subtitle indonesia