The sub's commander is ordered to stop to pick up an underwater demolition team led by Lt. Hayes whose mission is to locate and destroy an American submarine that had sunk in a lagoon off Bikini Atoll before the Japanese are able to raise it and capture the advanced radar system on board.

The gruff but good-hearted bosun's mate is wounded in the same fight, and Sherman has to take him back to Carey's sub, where he reports the team's discovery that the lagoon where the radar sub had sunk is full of Japanese vessels.

After setting their explosive charges, Malzone and Hayes are guided back to Carey's sub by Sherman (possessor of the "finest pair of lungs in the Navy"), just as a fleet of American dive bombers arrive to finish off the Japanese vessels in the lagoon.

"[9] The Los Angeles Times said that the film "... might be titled 'Operation Smorgasboard' since it's a combination of South Sea Island melodrama, war story and comedy.

"[10] Filmink wrote "it feels like a picture that began as a stock war story but then AIP panicked at some stage and ordered all this other stuff put in, like Frankie Avalon songs and scenes of Bikini Atoll.