Jim Mitchell has planned a perfect Halloween night - and a perfect film project - complete with a creepy mansion, live streaming video, and an all-night ghost hunt. He's convinced Sara MacGilvey and her friends to be his amateur ghost-hunters, and, as night falls, they enter the mansion with a film crew and start exploring. But the eerie darkness proves to be the least of their problems. After a quake nearly shakes the house apart, the ghost-hunters find two members of the film crew dead. They also discover that their phones aren't working, that no one outside is coming in to help them, and that if they try to leave the house, they'll suffer the same fate as the crew. Stuck in the dark and guided only by the contents of cryptic journals, Sara and the others must solve a closely guarded mystery, before they fall victim to people who are very willing to kill for what they seek.