WATCH: The family's story that inspired 'The Conjuring'

MANILA, Philippines - As if the previous two trailers of “The Conjuring” weren't scary enough, New Line Cinema has revealed a third trailer that's proven to be creepier. 

Based on a true story, “The Conjuring” tells the horrifying tale of how world renowned paranormal investigators Ed and Lorraine Warren were called upon to help a family terrorized by a dark presence in a secluded farmhouse. Forced to confront a powerful demonic entity, the Warrens find themselves caught in the most terrifying case of their lives.

“The Conjuring” stars Academy Award® nominee Vera Farmiga and Patrick Wilson as the Warrens, and Ron Livingston and Lili Taylor as Roger and Carolyn Perron, residents of the house.

James Wan (“Saw,” “Insidious”) directs from a screenplay by Chad Hayes & Carey W. Hayes (“The Reaping”).

Opening across the Philippines on August 21, “The Conjuring” is a New Line Cinema production and will be distributed by Warner Bros. Pictures, a Warner Bros. Entertainment Company.