Synopsis: When the American submarine Ulysses responds to a distress call, the Yugoslavian refugees they take onboard turn out to actually be Middle Eastern terrorists, led by Richter. They threaten to destroy Washington, D.C., using the sub's nuclear capabilities if they do not receive $100 million in gold. Former Navy SEAL James Carter, now a submarine designer, is brought in by Adm. Pendleton to sneak aboard the ship and defeat Richter.