Six hundred miles from the coast of Africa, in September 1942, a German U-boat, U-156, sinks the British troopship Laconia carrying 1,800 Italian POWs, 80 British civilians, and 268 Polish and British soldiers. After realising that there were POWs and civilians on-board, and that they are facing certain death without rescue, U-Boat Commander Werner Hartenstein (Duken) makes a decision goes against the orders of Nazi high command. The U-boat surfaces and Hartenstein instructs his men to save as many of the shipwrecked survivors as they can. Over the next few days U-156 saved 400 people, with 200 people crammed on board the surface-level submarine and another 200 in lifeboats. Hartenstein gave orders for messages to be sent out to the Allies to organise a rescue of the survivors, but they were spotted by American B-24 Liberator bombers which moved in to attack. The Sinking of the Laconia takes a look at the human side of the remarkable events that took place: the friendships that developed, the small acts of heroism, and the triumph of the human spirit in the most incredible of situations.