A damaged nuclear submarine lies on top of the most combustible substance known to man. And only one diver can reach...CHALLENGER DEEP! The clock is ticking. A damaged nuclear submarine sits atop an underwater glacier of methane ice, enough to blow the world in half. An elite salvage team mounts a daring rescue to prevent an explosive chain reaction that could lead to global disaster! From the creator of the hit Sci-Fi Channel show EUREKA.