Ruler: Master of the Mask Episode 3

Ga-Eun is worried the man ran into her. 

She hid him in women's palanquin and pretended as if they are mother and daughter. 
Yangsoo-Bureau people didn't notice and left. 

Ga-Eun: You almost got yourself into big trouble. Are you okay?

Lee Sun: Am I handsome?

Ga-Eun: ???

Meanwhile, the king ordered his personal guard to call his son, Chung Woon who also doesn't know the prince's face, to search for the prince before Pyunsoo group finds. 

Ga-Eun: Why do you keep talking to me casually?

Lee Sun: Well.. I can.

Ga-Eun: How come. What do you do?

Lee Sun: I am..a book seeker, Chun-Soo. 

She guided the prince the way to Woo Bo as she was his student.
On the way, she stopped by another Lee Sun's place to bring him together. 

They went up to his house. 

P: Do you know the reason why the crown prince has to war a mask?

WB: I know. Do you know Pyunsoo group?

P: Can you answer my question first?

WB: This year's precipitation is twice the amount of last year's. Then why are all the wells drying out?
If you bring an answer to my question, I will give the answer to your question. 

Prince: I will stay your(Ga-Eun) house to find an answer to Woo Bo

Lee Sun: No way! You are shameless!

Then Lee Sun pushed out the prince.

Ga-Eun stopped Lee Sun by calling his name. The prince was surprised to see Lee Sun had the same name as his. He laughed at the situation, saying "I have never had a fist fight with someone at my age."

and they had a moment...

At Lee Sun's home, his mother is about to deliver a baby, but there is no water. 

They rushed to Yangsoo-Bureau but couldn't get water. 

His father deceived the door guard to went into the Bureau and stole one bucket of water. 

Hwa-gun and the Bureau's officials saw the scene. 

Hwa-gun recognized the crown prince was among them by the neck mark. She wondered why he was there. 

The prince visited Woo Bo again pushed him to answer his question. Woo Bo raised his voice that the crown prince doesn't have the courage to protect his people taking off the mask. WB also said the prince to go back to his place if he enjoyed a moment freedom without a mask. Woo Bo knew he was the prince.  

Hwa-gun figured that the crown prince was disappeared and wanted to find him first than anyone. 

The prince at Ga-Eun's place was thinking of what Woo Bo told him. He shared the story to Ga-Eun liken to chicken. He was encouraged by her comment that the life of flying bird would be better than chicken's in a cage. He asked if she was already engaged to someone. 

At that time, Hwa-gun stimulated Yangsu-Bureau official, Jo Tae-ho to arrest the water thief immediately to find the crown prince. 

Early in the morning, Lee Sun ran to Ga-Eun's house to ask help for saving his father's life. 

... to be continued.