The film takes place aboard an American submarine in the Pacific during World War II. The sub's commander is ordered to stop and pick up an underwater demolition team led by Lt. Hayes, whose mission is to locate and destroy a US submarine sunken in a lagoon off Bikini Atoll before the Japanese are able to raise it and capture the advanced radar system on board.
Tab Hunter
as Lt. Morgan Hayes
Frankie Avalon
as Seaman Joseph Malzone
Scott Brady
as Capt. Emmett Carey
Jim Backus
as Bosun's Mate Ed Fennelly
Gary Crosby
as Seaman Floyd Givens
Michael Dante
as Lt. William 'Bill' Fourtney
David Landfield
as Lt. Jim Cale
Jody McCrea
as Seaman William Sherman
Aki Aleong
as Seaman Ronald Davayo
Marc Cavell
as Paul
Eva Six
as Reiko
Duane Ament
as Seaman Kingsley (uncredited)
