When the soul of a modern forensic doctor penetrates the abandoned daughter of the Marquis, she is forced to sign a "life-saving engagement" with the double-faced Marquis - she is a fake daughter with a divine hidden system, holding a golden finger that can recall memories and check luck, but on her wedding night, she discovers her husband's aura. His luck is "-999" and he is destined to die; he is a gentle and jade-like Marquis of Zhenbei on the surface, but secretly he is a cold-blooded leader who controls the Demon Cult. When the cold poison attacks, he needs to drink blood to stay alive, and the most suitable "Yao Yin" is the person next to him.
A contract marriage that began with exploitation revealed the dual conspiracies of the Immortal Cultivating Dynasty in Yunhuang Continent and modern time and space: the blood-sucking tragedy in the Hou Mansion, the undercurrent of the Demonic Cult in the North, and the mystery of the real and fake daughter's life experience, all intertwined into a web driven by the mission of the Divine Hidden System. She uses forensic knowledge to solve unsolved cases in secret rooms, and uses modern thinking to play with ancient intrigues; he repeatedly jumps between exploitation and heartbeat, interpreting the double life of "Yandering Marquis" and "Devil Cult Leader" to the extreme.
In the intertwined sweetness and abuse of marriage first and then love, there is hidden the redemption code of past life reincarnation - when the bloodline of the witch clan awakens, when the truth about the restoration of the country is revealed, the system interface suddenly pops up the ultimate mission: "Please choose the host - kill your lover and return to the modern age, or sacrifice your soul to fall into reincarnation forever?"
