Sarah Wolfe was the only living survivor from the massacre at the Vannacutt Mansion, but no one believed her claims that ghosts were responsible for the gruesome murders that took place there. Now her recent and questionable suicide leaves her sister, Ariel, no choice but to devote herself to finding out who - or what - was responsible for her death.

Ariel discovers that Sarah sent her the diary of the sadistic Dr. Vannacutt just before she died, offering clues to the diabolical evil that resides within the house. But the diary also makes Ariel a target in a deadly treasure hunt that leads a group of unwitting victims back to the Vannacutt Mansion, reawakening the terror imprisoned within the house on the hill.

This time, the house and the evil spirits inside are out to make sure that no one leaves alive.