It stars Dieter Eppler and Sabine Sesselmann and was directed by Harald Reinl.

The film begins shortly after the outbreak of World War II when Günther Prien reports to the commander of the U-boat force, Karl Dönitz.

Dönitz orders Prien as commander of U-47 to infiltrate the Royal Navy's primary base at Scapa Flow to inflict as much damage as possible.

Subsequently, he fails to give the order to dive on time and his boat is sunk by attacking enemy aircraft.

His most famous exploit was the sinking of the British battleship HMS Royal Oak at anchor in the Home Fleet's anchorage in Scapa Flow.

[4] His achievements as U-boat commander were highly idolized by Joseph Goebbels' Ministry of Public Enlightenment and Propaganda.