The Kaliningrad is the ultimate Russian Republic submarine, now prowling beneath the Arctic ice under the command of the brilliant and dangerous Admiral Alexi Novskoyy.

Sent to stop him is the U.S. Navy attack submarine USS Devilfish, commanded by Michael Pacino.

His orders are to destroy the Russian submarine.

His motivation is far more personal. Novskoyy killed his father.

Now, beneath the polar ice...

...the ultimate undersea duel begins.