Kim Min-ki

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.

Set in a tumultuous period where the political scene is murky and various people fought to gain power and the throne, the young king will do anything to strengthen his shaky position in court. His childhood friend Baek Rok leads a secret military force loyal to the king, called the "Black Cloud Swords." Baek Rok lives for his king, his brother Baek Kyul and his lover Jung Yeon, but when his ambitious brother betrays him and leads him into a trap, he finds himself on the run. He becomes a slave and gladiator, eventually returning to Joseon to seek revenge.