Ruler - Master of the Mask Episode 40 (Final)
The king hands Lee Sun an antidote. He says if Ga-eun is giving something, he will take it even if it is poison. He took the pill and saved his life.
King apologizes Lee Sun that he didn't know how dangerous to be his substitute. Lee Sun says he is the one who tried to steal his throne, so don't apologize and he also won't ask for forgiveness.
Ga-eun asks Lee Sun who is leaving if they can be like family as before, and Lee Sun says it is impossible to hold the water already spilled. The king tells Ga-eun to wait for him to come back.
The courtiers urge King to punish Lee Sun and Ga-eun removing his personal feelings. Ga-eun hears that from outside.
After leaving the Palace, Lee Sun recalls that his guard Hyun-seok, whom he had thoroughly believed, gave him a chance to doubt the king and begins to question him.
Ga-eun who thought she gives the difficult situation to King left the palace leaving a letter. King argues at the royal court that it is not fair Ga-eun who sacrificed a lot to save everyone's life has to leave. If it is everyone wants, then he also will leave the throne.
The king goes to Ga-eun and persuades her to come back for him and his people.
The people who have regained the water praise the king.
Lee Sun realizes that Hyun-seok is a person of Dae Mok and looks for he is. Hyun-seok became a guard of Ga-eun.
Lee Sun was killed by Hyun-seok's sword to protect Ga-eun. The King arrived at the moment Hyun-seok striking her and saved her life.
One year later, Ga-eun marries to the King and becomes new Queen.
