SBS "Great Doctor" Lee Min Ho and the past love that ultimately wounded him was revealed.

On the Monday episode of "Great Doctor," palace servant Choi goes to find Yoo Eun Soo (Kim Hee Sun) because she suspects something is wrong with Choi Young (Lee Min Ho).

When Yoo Eun Soo leaves for the door in the sky, Choi Young becomes disappointed in himself and thinks about death. Realizing this, the palace servant rushes to find Yoo Eun Soo and tells her that she thinks something is wrong with Choi Young and that he will listen to Yoo Eun Soo.

She then tells her about his past saying, "Have you ever seen the sword that he carries? It's a sword that he got from his teacher but there's an old rope around it. It belonged to his lover and they were going to get married but she died. It was 7 years ago." She continues, "They both learned from under the same teacher but the teacher was killed by the king under unfair circumstances. The girl blamed herself and decided to take her own life. After that Choi Young didn't even seem like a person."

She goes onto tell Yoo Eun Soo that he has recently changed and she thinks it's because of Yoo Eun Soo. However, now that Yoo Eun Soo has told him that she no longer needs him or trusts him, he has decided to perhaps take his own life as well. 

Worried and concerned, she rides back late at night and meanwhile, Choi Young is preparing himself for death and devising a trap for Ki Chul.