In June 1919, the German High Seas Fleet lies interned at Scapa Flow, seventy-four warships anchored under British guard while politicians in Paris argue over the peace terms that will decide their fate. Rear Admiral Ludwig von Reuter, commanding the skeleton German crews left aboard, faces a choice: hand the dreadnoughts over intact or destroy them himself. This film reconstructs how von Reuter organized a coordinated scuttling across the fleet, opening seacocks and flooding valves in secret until dozens of battleships and cruisers slipped beneath the water in a single afternoon, the largest self-inflicted loss of naval tonnage in history. Historians walk through the diplomatic deadlock that made the ships' status ambiguous, the British response as the scale of the sinking became clear, and the wreck sites that divers still explore in Scapa Flow today. Archival photographs, maps of the anchorage, and expert interviews trace why an admiral chose to destroy the machines he was trusted to preserve rather than let them become spoils of war.