"Great Doctor" Kim Hee Sun joined the King's army and is set to live in close quarters with Lee Min Ho.

On the Tuesday episode of "Great Doctor," Eun Soo (Kim Hee Sun) decides to hide out in the living quarters of Choi Young (Lee Min Ho).

After reading the letter from her future self, she risks her life and goes back to the hospital in order to save the princess's life. That causes the King to decide to face the Won Dynasty head-on.

Here, King Gong Min says, "I lied about Eun Soo. She's not someone sent from the sky." and this makes Ki Chul furious with betrayal. Both the Won Dynasty and Ki Chul vowed to attack the King.

Choi Young feared for Eun Soo's safety and she answers that she'll hide in the safest place in Koryo, meaning his living space. She changes into the uniform of the King's army and appears at his room.

She says, "Private Yoo Eun Soo reporting for duty. I'm going to hide out here. The safest place, the captain's room. I got permission from the King and I got my sword too."

Choi Young, who seemed dumbfounded, approached her and says, "Because I'm the captain." She replies, "Here, I'm not going to escape."