Ruler - Master of the Mask Episode 18

The girl tries to draw a map to show everyone the location of the poison field, however, she dies. Mae Chang gives a map to Ga-eun saying that is from the girl. It is too detailed for the child to draw it. 

There is news that Yangsu-cheong officials are looking for the girl. The head tells to Ga-eun to stay away for a while. Ga-eun asks for one day before leaving.

Prince decides to confess his identity and her father's death before she leaves.

On the next day, Ga-eun brings Prince to Han Kyu-ho's tomb. She says that she has met the King of her enemy who killed her father, associated with Pyunsoo. But Chun-soo is fighting against them, so please protect him. 

At the moment Prince was going to confess about his story to Ga-eun, she first spoke out to take care of himself. Hearing him saying yes, Ga-eun says now she can leave in peace. Prince promises her to see her as soon as possible. 

King, who hears that the herbal medicine shop of Ga-un is going to close the door, goes out in secret to see his mother from afar and meets his sister.

At that moment, Dae Mok appears asking if she is King's sister. The girl runs into her house. 

The king follows his sister with his eyes and is surprised to discover that the prince is alive. 

Dae Mok is about to turn toward the house. King grabs his clothes to turn back to his side again. Dae Mok couldn't see the prince. 

Prince tells Woo Bo the story that he met Lee Sun. He promised to meet the King again. Woo Bo feels that is too dangerous, but Prince has already decided his mind. 

Ga-eun decides to be a court lady and enters into the palace. 

The prince, who heard the news late, calls Ga-eun in front of the gates, but Ga-eun just enters into the palace.