I am Pei Wujiu, Chang'an's number-one spoiled heir and the only son of a military family. I may seem reckless and carefree, but I carry my family's blood debt on my shoulders.
Beneath the splendor of the Tang dynasty, demonic mists stir in the shadows, and evil spirits run rampant on nights of lunar eclipse. By chance, I rescue a mysterious doctor named Qing Dai. Gentle as an immortal, she hides a fox tail and three flames.
We distrust each other, yet live under the same roof. Gradually, I realize she needs the blood from my heart to stay alive, while each night my soul wanders through the mist and I catch glimpses of her drinking blood to heal her wounds.
To make matters worse, an order for military marriages on the border forces me to wed the prime minister's daughter. But my heart already belongs to a sharp-tongued, soft-hearted little fox.
There is treachery at court and unrest in the army, and her origins turn out to be connected to the old case of the Pei army's massacre in the valley. With love and hate tangled together, and loyalty impossible to distinguish from treachery, I must keep playing the spoiled heir, hiding my strength as I protect her.
