This conventional wartime drama is comprised of an inexplicable mix of moods and genres as a U.S. submarine in World War II heads out to the island of Bikini in the South Pacific to destroy the remains of a sunken sister ship. The ruined ship has some delicate radar equipment on board that cannot fall into enemy hands. Meanwhile, the Japanese naval command is sending out its ships as control over the Pacific is at issue. This builds up into a major sea-going confrontation as the forces on each side are strengthened and expanded. Incongruously mixed in with the growing tension is a love story between Lt. Morgan Hayes (Tab Hunter) and the voluptuous Reiko (Eva Six). Frankie Avalon, as one of the seamen, sings a few songs, and others contributing to the action are Jim Backus as a chief bosun's mate, and Gary Crosby as another seaman.