Here’s 3 main posters for upcoming MBC drama series “Ruler: Master of the Mask” starring Yoo Seung-Ho & Kim So-Hyun. Story for the drama series will depict the love and lonely fight of Crown Prince Lee Sun (Yoo Seung-Ho). He goes up against the Pyunsoo hwe group. The group has accumulated power and wealth through the privatization of water in Joseon. “Ruler: Master of the Mask” will be released May 10, 2017 in South Korea.