College student Chen Chuan and his roommates escaped from a cockroach-infested dormitory and rented an old building in an urban village at a low price, but they fell into a carefully crafted horror trap. The strange howling of the black cat, the blocked restricted area on the sixth floor, the mysterious disappearance of blood stains, the palms engraved with blood... A series of bizarre events followed. Not only do they have to fight against the evil spirits entrenched in the building, but they also have to face the master who controls everything. They struggle to survive in the gap between human nature and fear, and uncover the bloody secrets hidden deep in the building.
