A privately-financed scientist and his colleagues hire an ex-Navy officer to conduct an Alaskan submarine expedition in order to prevent a Red Chinese anti-American plot that may lead to World War III. Mixes deviously plotted schoolboy fiction with submarine spectacle and cold war heroics.

Richard Widmark
as Capt. Adam Jones

Bella Darvi
as Denise Montel

Victor Francen
as Prof. Montel

Cameron Mitchell
as 'Ski' Brodski

Gene Evans
as Chief Holter

David Wayne
as Tugboat Walker

Stephen Bekassy
as Neuman

Richard Loo
as Hakada Fujimori

Robert Adler
as Welles (uncredited)

Eugene Borden
as French Reporter (uncredited)
CinemaSerf
Richard Widmark is on quite good form here, as the veteran naval officer hired by a group of scientists to take a ramshackle old submarine from Japan to investigate some mysterious goings-on on an island under Chinese control, and where they think atomic experiments may be taking place. Setting sail...