Atan, a papermaker in the capital, was born with strange eyes. He could see the obsession in the heart of the deceased. He just wanted to live a stable life, but he was forced into the mystery of the blood contract that had been buried for centuries by a paper bride's funeral.
Xie Wuchen, the cold and cold Taoist priest, noticed the profound karma and yin and yang in her body and came to accompany her. At first, the two tested each other and took advantage of each other. They used paper men and horses as weapons along the way to solve mystery cases in the streets and monsters in the mountains.
Layers of fog were lifted, and Atan's secret life experience emerged: she was a living sacrifice left behind by the war between humans and ghosts a hundred years ago, and her blood forever suppresses the rift between Yin and Yang. The man behind the scenes uses the blood contract to stir up chaos between humans and ghosts, in an attempt to overturn the balance of yin and yang.
Atan and Xie Wuchen join hands to slay demons and fight against the source of the curse. On the way, they are shocked to realize that their fate has been forged thousands of years ago. In the end, they cut off the shackles of fate together, stabilized the two realms of yin and yang, broke away from the shackles of reincarnation, and were able to stay together for salvation.