Edward Carnby (Christian Slater) is a private investigator specializing in unexplainable supernatural phenomena. His cases delve into the dark corners of the world, searching for truth in the occult remnants of ancient civilizations. Now, the greatest mystery of his past is about to become the most dangerous case he has ever faced. With the help of his ex-girlfriend, archaeologist Aline Cedrac (Tara Reid), and his bitter rival, government agent Richard Burke (Stephen Dorff), Edward is about to learn that just because you don't believe in something doesn't mean it can't kill you.