An international group of film students finds a disturbing video clip on the dark web which seems to contain poltergeist phenomena. Agreed that it's just what they need for their latest documentary project the group travels to the sanatorium shown in the video clip. Once there, they rig up their camera equipment and start to explore the possible ghost activities - until the true horror begins.,“这是你逼我们的,现在你给我们一笔钱,然后签一份购买协议,表示我们现在地理的那些农产品是你自愿收购,否则的话,今天你是不可能从这里走出去的!”……