Wildlife ranger Su Nuan accidentally saved an endangered black python with his rare "Blazing Heart" blood during a flash flood rescue, but he didn't know that it was the supreme king of the snake tribe - Mo Xun. An ancient blood contract that started with a mistake dragged her into the cold and gorgeous abyss of the demon clan. Forced to become the "Yao Yin" and contracted wife of the Snake King's ultimate power, in her extreme fear and resistance, she unexpectedly became the only flame that ignited Mo Xun's lonely life for thousands of years. However, the internal strife within the snake clan, the pursuit of generations of enemies, and the gradual reawakening of her own sealed exorcist blood... Made this relationship that began as a forced relationship increasingly dangerous and complicated. Love and hate are intertwined, and it is difficult to distinguish between use and sincerity. They must find a way to redeem each other amidst conspiracy and war, otherwise joint destruction will be waiting for them.
Concept: Love is a willing sinking, and it is the ultimate resonance and mutual redemption achieved by two independent souls in the midst of opposition and entanglement after breaking all shackles.