In the mid-20th century, Griffith lives in the West Indies with his father, a famous scientist who studies marine biology. Griffith, who helps his father with his research, thinks the work is pretty boring. He hopes to go back to America soon to attend the Air Force Academy.
Griff suddenly becomes more interested in his father’s work when something in the sea starts attacking ships near the island he lives on. Some people think it’s a dupee, others think it’s a Russian submarine.