In this gripping 1943 war film, American Merchant Marine sailors Joe Rossi (Humphrey Bogart) and Steve Jarvis (Raymond Massey) embark on a perilous mission to escort a convoy of supplies across the treacherous North Atlantic to Russian allies during WWII. As they navigate through treacherous waters, their ship comes under attack by a German U-boat, prompting an intense cat-and-mouse game between the two crews. With bravery and determination, Rossi and Jarvis fight to outsmart the enemy and deliver much-needed supplies to the Allies, earning the gratitude of President Franklin D. Roosevelt in this tribute to the unsung heroes of the Merchant Marine.