Ruler: Master of the Mask


Ruler: Master of the Mask tells the story of Joseon Crown Prince Lee Sun who fights against an organization called Pyunsoo-hwe that has gained power and wealth through the privatization and monopolization of the water supply all over Joseon. For some reason, he has to hide behind a mask but still manages to bring hope for the people who suffer from all the injustices. He finds support from the woman he loves and becomes a true ruler.


General Information

  • Status: ONGOING
  • Drama Title: Ruler: Master of the Mask
  • Other Titles: Monarch
  • Genre: Historical, Political, Romance
  • Director: No Do-cheol
  • Writer: Park Hye-jin
  • No. of Episodes: 40
  • Broadcast Period: May 10-July 13, 2017
  • Time Slot: 22:00 Korean Standard Time, Wed & Thu
  • Runtime: 35 minutes
  • TV Network: MBC (free-to-air)
  • Production Company(s): People Story Company, Huayi Brothers
  • Preceded by: Radiant Office
  • Followed by: Hospital Ship

Main Cast & Characters

main cast of Ruler: Master of the Mask

Yoo Seung-ho as Prince Lee Sun. He is a crown prince who needs to hide behind a mask for a reason initially unknown to him. For his subjects, he strongly fights against all injustices and oppression.

Kim So-hyun as Han Ga-eun. She is said to be unladylike as she grew up in a family of warriors. Despite her mother’s early death and her family’s financial problems, she becomes a woman who has a gentle personality behind her strong and independent facade. She is the woman who will help Prince Lee Seon to be a just ruler.

Kim Myung-soo as Peasant Lee Sun. As needed, he swaps places with the Crown Prince Lee Seon and also wears a mask. Even if he is uneducated, he is born with intellect. He falls in love with Han Ga-eun who teaches him to read, gives him a name, and treats him well as a human being.

Yoon So-hee as Kim Hwa-gun. She is the granddaughter of the leader of the Pyunsoo-hwe which is against the monarchy. After personally meeting Prince Lee Seon, she begins to develop a dangerous unrequited love for the crown prince.


Official Posters

Original Soundtrack

  • OST Part 1
  • OST Part 2
  • OST Part 3
    • No. 1: For A While by Hwang Chi-yeul
    • No. 2: For A While (instrumental)
  • OST Part 4
    • No. 1: Star and Sun by Kei (Lovelyz)
    • No. 2: Star and Sun (instrumental)
  • OST Part 5
    • No. 1: Between Seasons by Kim Yeon-ji
    • No. 2: Between Seasons (instrumental)
  • OST Part 6
    • No. 1: I’m OK by Kim Na-young
    • No. 2: I’m OK (instrumental)
  • OST Part 7
    • No. 1: The Tree by Yang Yo-seob (Highlight)
    • No. 2: The Tree (instrumental)
  • OST Part 8
  • OST Part 9
    • No. 1: Sparkling by Hwanhee
    • No. 2: Sparkling (instrumental)
  • OST Part 10
  • OST Part 11
    • No. 1: Affection by Gavy NJ
    • No. 2: Affection (instrumental)
  • OST Part 12

News & Developments


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