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Peter Taylor (Kevin Bacon), his wife Bronny and their two children return to Los Angeles after a fun-filled vacation to the Grand Canyon. Strange events soon start to plague the family, including young son Michael's increasingly erratic behavior. The Taylors learn that Michael brought back some mysterious rocks that he discovered inside a cave. Unfortunately, something followed them home as the clan now find themselves in a battle with a supernatural force that preys on their worst fears. Wikipedia