The USS Thunderfish completes a secret mission to rescue orphans on a remote Pacific island and heads back to Honolulu, only to encounter a Japanese aircraft carrier. Despite their efforts, the submarine's torpedoes malfunction again, a recurring issue plaguing the fleet.

Operation Pacific
A submarine officer navigates the treacherous waters of World War II, battling a crucial technical issue with his torpedoes while attempting to reconcile with his estranged ex-wife.