Xie Jin pierced the heart with a sword and killed Shen Zhaolin with his own hands. The blood stained the green blade and the whole city was silent. Three years later, he was reduced to a useless person, but when he looked up at the secret guard's office, he saw her dressed in mysterious clothes, with an imperial iron order hanging on her waist. He looked down with cold eyes: "Xie Jin, you deserve death, and now I will execute you." She did not come back from the dead, but climbed up to a high position on a mountain of corpses and a sea of blood - the commander of the northern secret guards, the "Lone Eagle" personally named by His Majesty. He bowed his head and confessed, but she took him under her wing and ordered him to practice his sword skills again and hunt down his old enemy. This is not forgiveness, this is a chess game of revenge. She wanted him to witness with his own eyes how the sword she had taught him could cut through the mountains and rivers he once knelt down to worship.