Set in the Joseon era, Ruler: Master of the Mask follows Crown Prince Lee Sun (Yoo Seung-ho) as he struggles against the powerful monopoly that controls the nation’s water supply.
| Directed by: | Noh Do-chul, Park Won-gook |
| Written by: | Park Hye-jin |
| Starring: | Yoo Seung-ho, Kim So-hyun, Kim Myung-soo, Yoon So-hee, Heo Joon-ho, Park Chul-min |
| Extended Cast: | Kim Byung-chul, Kim Jong-soo, Do Yong-goo, Jung Kyu-soo, Kim Young-woong, Kim Seo-kyung, Park Ki-ryung, Lee Ki-young, Um Hyo-sup, Shin Hyun-soo, Bae Yoo-ram, Lee Chae-young, Park Hyun-suk, Jung Hae-gyun, Go Na-hee, Kim Myung-soo, Kim Sun-kyung, Choi Jin-na, Jung Doo-hong, Song In-guk, Jung Ah-mi, Lee Dae-ro, Jeon No-min, Jin Ki-joo, Gong Jung-hwan, Min Pil-joon |
| Original network: | MBC TV |
| Original release: | 10 May 2017 –13 July 2017 |
| No. of episodes: | 40[a] |
| Running Time: | 30 minutes[a] |
| Executive producer(s): | Kim Kyung-hee |
| Production Company(s): | People Story Company, Huayi Brothers |
| Distributor: | MBC |
| Source: | http://www.imbc.com/broad/tv/drama/gunju |
