In the hunting ground of the demons, the blade of the snow knife is pressed against the throat of the young girl Adi, but he is shocked to realize that she is actually a saint who has been missing for ten years from the demon sect. In a sudden thought, he cut off his robe and spared her life. From then on, they both became traitors of good and evil. On the road to the end of the world, from suspicion at every step to embracing each other in the snowstorm, they are each other's only salvation. When the entire world regarded them as enemies, Xuedao abandoned the past, warmed her hot life with his cold body, and vowed to accompany her to return the life she had taken back to the world.
"With this knife, I will repay you for saving your life." The snow knife cut off the sleeves and robes, but it cut off the fateful entanglement with the devil's saint Adi. From escaping side by side to being wanted in the world, from the confrontation between good and evil to being dependent on each other in life and death, the two became each other's only light in a desperate situation. Until the top of the snow-capped mountains, when she had a high fever and babbled, he finally made a fiery oath with his cold embrace: "Don't be afraid, my life is yours, and I will pay it back with you now." This is a desperate romance that is against the whole world.