Folklore scholar Chen Mo received a strange ancient book "The Record of the Underworld" seven nights before his grandfather's death. Bloody words appeared in the book, revealing a dark marriage contract a hundred years ago: Shen's daughter Shen Qingqiu was sacrificed by the family in exchange for three generations of wealth. The price was to sacrifice an heir every sixty years as a "contracted servant." When emergency doctor Su Wanqing treated a comatose man with a strange red string tattoo on his wrist, Chen Mo discovered that the contract had not ended, but was accelerating his death.
In order to break the century-old curse, Chen Mo teamed up with Su Wanqing, who has a yin and yang eye, and with the limited assistance of detective Wang Jianguo, they entered the gloomy old house and abandoned ancestral hall. They faced the resentful spirit with the red rope around their necks, uncovered the bloody secrets of the family, and finally used blood as a guide to terminate the contract, but they paid a heavy price - Li Guoqiang became a hybrid of two souls, and Chen Mo's wrist was branded with a red rope mark that cannot fade away.
And it's far from over. Writing appears in the reflection in the mirror, and the owner of the mysterious mirror shop issues an invitation. Three days later, the door to the "Ghost Market in the Mirror" is about to open. Memory, lifespan and appearance are traded there, and there is also a greater secret behind the contract. When reality and the mirror world began to overlap, Chen Mo discovered that the curse from a hundred years ago was just the tip of a huge shadow...
