A suspenseful supernatural drama. In 1933, in Haicheng, a young man named Jiang Ning falls into debt while trying to pay for treatment for his seriously ill father. Pressured by debt collectors and their thugs, he is forced to spend the night keeping watch at the Yu family's century-old haunted house. The promised wage is an astonishing three silver dollars for just one night. There are four ironclad rules governing survival in the house. Anyone who breaks them will be trapped inside forever, never to leave even their bones behind. Jiang Ning signs a blood-red contract and touches a triangular mark carved into the wall, unknowingly binding himself to a pure-blooded lineage of house guardians. He gradually unlocks three levels of supernatural abilities: hearing lingering echoes, concentrating shadows into visible forms, and entering memories through reflected images. As restless spirits whisper and terrifying illusions repeatedly appear inside the mansion, Jiang Ning relies on three places that suppress the house's spiritual veins, including the eastern side room and the library, to stay alive. There, he encounters Old Zhou, the mansion's steward, and Fu Xue, who is disguised as a servant. The two are respectively descendants of a guardian lineage passed down through reincarnation and an orphaned direct descendant of the founding house guardian who inherited the guardian seal.