Uhm Tae Woong as Yeon Chung
Yeon Chung is son of Yeon Gae So Mun (Goguryeo’s most powerful man). Yeon Chung came to the capital city of Goguryeo, Pyeongyang, to see his father for the first time, but unfortunately, his father doesn’t want to acknowledge him.
In order to get a higher status, he applies for the warrior test and after passing the test, he becomes Princess Mu Yeong’s guard.
Kim Ok Bin as Princess Mu Yeong
Princess Mu Yeong is King Yeong Nyu’s daughter, she’s an active and bright woman. King Yeong Ryu really loves her and he trusts her more than her younger brother, who is the heir to the throne.
When she’s wandering around the street and disguising as a man, she meets with Yeon Chung, son of her father’s political rival and fall in love with him.
Kim Young Chul as King Yeong Nyu
King Yeong Nyu is a military hero who fought against the 1.1 millions soldiers of Sui Dynasty. He is also an excellent negotiator who can conclude secret agreement and who can join hand with the political opponents. He’s a very brave King. He makes peace with Tang Dynasty.
Choi Min Soo as Yeon Gae So Mun
As the head of Yeon’s family, he’s endowed with financial & military power. His charisma allows him to take control and reigns over the council of nobles. He insists to attack Tang and this makes him fighting against King Yeong Ryu and his followers.
On Joo Wan as Jang
Lee Jung Shin as Shi Woo
Park Soo Jin as Mo Seol
Pic cr: KBS