Action-thriller Sanctum, from executive producer James Cameron, follows a team of underwater cave divers on a treacherous expedition to the least accessible cave system on Earth. When a tropical storm forces them deep into the caverns, they must fight raging water, deadly terrain and creeping panic as they search the underwater labyrinth for an unknown escape route to the sea. Shot on location off the coast of Australia, this taut and claustrophobic thriller brings a feeling of trapped dread to the audience!