In 1981, a film about the misadventures of a German U-boat crew in 1941 becomes a worldwide hit almost four decades after the end of the World War II. Millions of viewers worldwide make Das Boot the most internationally successful German film of all time. But due to disputes over the script, accidents on the set, and voices accusing the makers of glorifying the war, the project was many times on the verge of being cancelled.

"Laughing with Hitler" is a journey into a supposedly humorless time. In the Third Reich, however, the Führer and his Nazi bigwigs were laughed at. The political jokes of the Hitler years were a barometer of true public opinion. But those who dared to make jokes critical of the regime lived dangerously. In the early Nazi era, Hitler jokes were punished as "insidious", during the war even as "undermining of military strength" and the penalty was the death penalty! The conflict with the Nazi authorities ended more mildly for other pranksters: the cheeky cabaret artist Werner Finck was deported to a concentration camp, but was released again.

Based on an autobiographical novel by German World War II photographer Lothar-Guenther Buchheim, Das Boot follows the lives of a fearless U-Boat captain (Jurgen Prochnow) and his inexperienced crew as they patrol the Atlantic and Mediterranean in search of Allied vessels, taking turns as hunter and prey.

A German submarine hunts allied ships during the Second World War, but it soon becomes the hunted. The crew tries to survive below the surface, while stretching both the boat and themselves to their limits.