It's now December 1942, and U-boat ace Johannes von Reinhartz is handed a new secret mission to transport three saboteurs to the US East Coast on board U-822. When his loyalty is questioned, U-612 -- with its CO Wrangel -- is sent in pursuit.
Having escaped certain death out on the Atlantic, former U-612 CO Hoffmann finds shelter in New York with Sam Greenwood, who owes his life to Hoffmann. He meets sleazy German-born lawyer Berger, but will Berger help Hoffmann to return home and clear his name?
Back in La Rochelle, Simone and her roommate Margot battle to secure an escape route for a Jewish family, but Forster, Head of the Gestapo, is watching their every move.