Ruler - Master of the Mask Episode 27

The rumor that the daughter of the second vice-premier will become a queen, as the Queen Mother has Ga-eun, begins to spread in and out of the palace.

King receives the drug's antidote from Cheif Peddler, but it turns out to be a poison. 

The king dismisses his belief in Cheif Peddler and tells Dae Mok that he wants to become a real king and that the real Crown Prince is alive.

Dae Mok realized that Hwa-gun becomes Dae Pyun Soo because of the Crown Prince. She says if he kills the prince then she will kill herself in front of him. Dae Mok confines Hwa-gun to a room. 

Ga-eun and Mae Chang are caught on the way to see the Prince. King takes Ga-eun to the greenhouse and takes off his mask and shows his face. 

The king tells her that Prince flees after putting him under a mask five years ago and revealed that Chief Peddler is the prince. Ga-eun is captivated by the shock.

Knowing all the facts, Ga-eun leads Prince to the greenhouse, shows the letter that he dropped to Kyu-ho, and asks again if Chun-soo is the prince who killed her father.