Yan Ye was originally the deposed prince of the previous dynasty, armed with a cold iron sword. He was expelled from the imperial city and lived in the borderlands. However, by chance, he traveled to another time and space and was trapped in the whirlpool of intrigues. He endured the humiliation, used his sword as pen and blood as ink, vowing to regain his own country. Yuchi Ling, who was born as a general but willing to serve as a secret guard, once pushed him into the abyss with his own hands, but in the life-and-death confrontations, his soul was burned by the solitary flame in his eyes. When the cold blade pierces the curtain of imperial power, when loyalty and betrayal reverse, they are no longer enemies, but each other's only salvation.
