This billionaire's luxury doomsday bunker has everything: spectacular ocean views, a full-service kitchen, three bedrooms, a broadband connection, and concrete thick enough to keep any kind of horror out. Today, the bunker's caretakers are about to discover those concrete walls are good-too good —at keeping them trapped with the horrors inside. Twenty feet below the world's most beautiful beach, they'll face the ultimate evil-one that transcends death itself.