In the seventeenth year of the Republic of China, heavy rains continued in the south of the Yangtze River. The Lin family's ancient house, which had been abandoned for ten years, suddenly received uninvited guests. Antique dealer Zhao Wenqi led a team of six people to sneak into the house in search of the legendary "Jade Pendant of Hundred Birds Chao Feng", but unexpectedly stepped into a carefully crafted death trap. First, the apprentice disappeared mysteriously, and then the guide and bodyguard disappeared one after another. The dust-covered diary in the house and the bloody handprints on the wall gradually revealed the truth behind the massacre of the Lin family. When the survivors discovered that every mechanism in the ancient house corresponded to a missing person, they finally understood that they were not treasure hunters, but sacrifices summoned to fill the "seventh vacancy." Deep in the ancient house on a rainy night, next to the glass lamp that is always on, is there a living person or a dead soul hiding?