Kingdom of Goguryeo, ancient Korea, 645. The ruthless Emperor Taizong of Tang invades the country and leads his armies towards the capital, achieving one victory after another, but on his way is the stronghold of Ansi, protected by General Yang Man-chu, who will do everything possible to stop the invasion, even if his troops are outnumbered by thousands of enemies.

It tells the story behind the family fate of the Prince who was hit by a strange attack where he suffered heavy losses, and his whereabouts are unknown. Empress Wu was furious and ordered Zhong Xingluo, the leader of the Tianji Dao, to find the prince within seven days. During the search, he was attacked by the ghost and half-demon Emperor Jun. On the trail, the two killers continued to fight each other with dead bodies everywhere. In the end, both sides suffered heavy casualties.