There was a strange custom in the Dayan Dynasty. The deceased had to marry a "night-watching bride" to hold the house in order to suppress the spirit of death with a festive ceremony. Lin Wantang married Gu Mansion to save her sister. When she entered the bridal chamber, she found that the groom had been dead for three days. All members of Gu Mansion pretended to be alive and regarded her as a sacrifice. She holds the tampered "Rules of the Night Watch" and knows that it is a contract signed with the evil spirit - the bride of the Night Watch is both a victim and a guardian, and the rules are her only talisman. With his natural yin and yang eyes, Lin Wantang can only see the strange true appearance from the shadows, but every time he uses it, he has to pay the price of temporary blindness. The undercurrents of Gu Mansion are surging, the family interests are intertwined, and the countdown to death is approaching step by step. She must survive in the cracks of the rules every night. When the gaze in the shadows becomes colder, can she uncover the truth about the house-holding ritual, or will she become the prey of evil spirits?
