After the vampire clan's defeat in war, a forced marriage alliance was arranged. But the wrong prince — Cecil, a sickly imposter with a fragile heart and a hidden past — was sent in place of the true heir. Betrayed by his lover Rain and the real prince Leon, Cecil was stripped of his status and reduced to servitude. On a snowy night, he crossed paths with Cain, the human emperor. One night of entanglement changed everything — for Cecil discovered that intimate contact with Cain could heal his ailing heart. Cain took Cecil under his protection, and they entered a quiet, unspoken arrangement — tender, dangerous, and consuming. Leon, consumed by jealousy, attempted to sabotage Cecil again and again, but each scheme was exposed. Stripped of his title, Leon fell from grace. Cain dissolved his engagement, and when Cecil's true identity was restored, the two rulers united in marriage — not for politics, but for love.