A year ago, the sudden disappearance of the mistress of a mansion caused everyone in the house to be suspicious of each other, and a series of strange events that happened afterwards made everyone start to feel terrified. Everyone was guessing the reason in their hearts, and secretly fighting for the inheritance left by the mistress, including her priceless diamond necklace. Nothing in the mansion has changed, but new members and new stories are constantly happening. It turns out that all the bizarre facts originated from this priceless "diamond necklace".