Sorry, the license for this show has expired. Set in a tumultuous period where the political scene is murky and various people fought to gain power and the throne. The Young King's childhood friend Baek Rok (Jo Dong Hyuk) leads a secret military force loyal to the king, called the Black Cloud Swords. He lives for his king, his brother Baek Kyul(Seo Do Young) and his lover Jung Yeon (Jun Hye Bin), but when his ambitious brother betrays him, he finds himself on the run. He becomes a slave and gladiator, returning to Joseon to seek revenge.