Kim Chunchu is the grandson of King Jinji, but when his grandfather is overthrown, Chunchu is denied the chance to become a successor to the throne of Silla. He later meets Kim Yushin, and the two men begin a friendship. Chunchu later becomes King Muyeol, the 29th Korean monarch who leads the unification of three ancient kingdoms - Goguryeo, Baekje and Silla, while Kim Yushin becomes one of the greatest generals in Korean history.
Greena Ell Park (born January 8, 1985) is a South Korean actress. Park debuted in the film The Ghost (2004). Known for her ability to act various characters, she is loved by many viewers for her outstanding roles, including the cafe waitress Hee-young in BABO (2008), the tom·boy Soon-nam in Once Upon a Time in Seoul (2008), and the female cop Lee Min-jae in the television series The Devil (2007).