On Summerween, a former circus clown escapes a mental institution to return to his abandoned mansion and hunt the teens partying there.
Four college students venture to a storied haunted house over night. The goal is simple, obtain research for a paper they are writing on urban myths and legends. A caretaker, played by Richard Grieco, greets them and offers to share the tale of the home's tragic beginnings. As events unfold, the group starts to understand there's more to the stories than they first believed. Friendships and motives are questioned. The gentle caretaker's role is brought into questions. When tragedy strikes, they finally understand that Sanctus House is more than myth.
The plot follows six strangers who enter a cash-prize endurance challenge at the Val Verde Hotel, a location infamous for a fatal explosion and rumors of being haunted. Instead of being stalked by a physical, masked serial killer, the contestants face immersive, supernatural scares when the hauntings at the hotel turn out to be all too real.
即将临盆的李晴（李贝贝饰）被带往一处郊区别墅静心待产，却在看似周密的照护背后，落入一场精心布局的惊天阴谋。身边所有人都试图让她相信一个被构造的“真相”，精神压力与诡谲氛围不断侵蚀她的判断力，使她难以区分现实与幻觉。随着恐慌升级，她随身携带的DV成为突破迷局的重要线索，故事走向也随之产生翻转。
