The fate of humanity rests in the hands of a Soviet submarine captain whose tragic past casts a dark shadow over the present, and whose underwater craft might be host to an otherworldly entity in this apocalyptic thriller starring David Duchovny, Ed Harris, and William Fichtner. The Cold War has enveloped the entire globe, and when a Soviet submarine targets the U.S. Navy's Pacific Fleet for nuclear attack, it appears that the final battle has begun. But Capt. Dmitri Zubov (Harris) has a choice -- one that could pull the world back from the brink of annihilation. Meanwhile, it seems as if other forces are at work on Zubov's submarine. Now, in the depths of the South Pacific, Capt. Zubov will fight to ensure that there will be a future for every man, woman, and child on the planet.