After a terrorist bombs the embassy in Bulgaria, costing many people their lives, Roy Turner is assigned to transport Casper to his new prison home. Unfortunately, the sub that they're on is the...

After a terrorist bombs the embassy in Bulgaria, costing many people their lives, Roy Turner is assigned to transport Casper to his new prison home. Unfortunately, the sub that they're on is the target for a deep-sea giant octopus, the result of a nuclear waste dump during the Cuban missile crisis.