|Richard Widmark||Capt. Adam Jones|
|Bella Darvi||Denise Montel|
|Victor Francen||Prof. Montel|
|Cameron Mitchell||'Ski' Brodski|
|Gene Evans||Chief Holter|
|David Wayne||Tugboat Walker|
|Richard Loo||Hakada Fujimori|
Mercenary sub commander, Captain Adam Jones, sells his services to noted atomic scientist Professor Montel and his daughter, Denise . Professor Montel is convinced the Communists are about to launch a nuclear attack on Korea from an island in the Arctic and blame it on the United States. Captain Jones does not care about politics, but the earnest Professor and his supporters win him over to their cause and they try to thwart the Communist's plans.