It is a wonder whether Lee Yo Won will ever get her happily ever after.

On the 45th episode of the MBC drama "Horse Doctor" that aired March 5, Kang Ji Nyung (Lee Yo Won) discovers that her place has been switched with Baek Kwang Hyun (Jo Seung Woo). Kang Ji Nyung feels guilty for thinking that she has kept Baek Kwang Hyun from going further in life than where he is now.

A former slave Baek Suk Goo (Park Hyuk Kwon) had switched the two when they were young in order to save Baek Kwang Hyun. Kang Ji Nyung believed she has caused him only pain.

Kang Ji Nyung was shocked once again when she heard the truth. Baek Kwang Hyun, Lee Sung Ha (Lee Sang Woo) and Jang In Joo (Yoo Sun) were aware of this truth.

Kang Ji Nyung thought of the moment when her biological father Baek Suk Goo sacrificed his life to save her. He had said, "You're a girl, not a boy. You're.. you're.. baby" then passed away.

Kang Ji Nyung was angry that he had hidden their relationship to her up until his death. However, she was even more upset with the reality that he had to hide the truth from her. She couldn't blame everything on the people who knew about the switch since they kept the secret because they worried Kang Ji Nyung would be sent to become a slave.

Kang Ji Nyung reveals Baek Kwang Hyun to the queen in order to save her. Her efforts may have worsened everything for Baek Kwang Hyun. It turns out however, that he couldn't have done any better without her help.

It seems as though Baek Kwang Hyun will be able to perform on the queen because of Kang Ji Nyung's help. However, she puts her life is danger by revealing that she is just a civilian.