She was a substitute bride sacrificed by her family to the "Living King of Hell". Carrying the shackles of her family's survival, she stepped into the heart-devouring Black Armor Palace. He is a ruthless regent who has a lot of troops at his disposal. His heart was frozen due to a tragedy that killed his entire family, and he hates "her" deeply. On their wedding night, he tore her wedding dress to pieces, but when she was dying, he found a birthmark on her neck that was completely different from what he remembered - a tiny, burning flame mark. This mark, like a key, quietly unlocks the bloody truth that has been sealed for ten years. As layers of fog were lifted, she discovered that she was not only a stand-in, but also a key figure who had been deliberately erased in the tragedy. And he, the man who hated her to the core, was actually her blood-related brother? Or... Is there another secret? In the whirlpool of power struggles and conspiracies, they jump repeatedly on the blade of love and hate. Every time they get closer, they are accompanied by deeper injuries, and every time they separate, they are on the verge of complete destruction. When the flames of truth burn away all pretense, can they find each other in the ashes, or can they only become each other's eternal obsession and pain?
