Opening credits are shown over a background of a submarine at the surface, with the name "U67" on the side... a reference to the plot.
Title Card: Foreward -- The submarine -- terror of the seas -- struck fear to the belligerents and neutrals alike during the world war. Some of the scenes in this picture show authentic exploits of the U67 under actual wartime conditions, the aftermath of which forms the basis of the story of this picture.
S.S. Alatania, bound from New Orleans to Plymouth, England.