Janggun ui Suyeom The General's Mustache (1968)

The movie begins with the mysterious death of a journalistic photographer named Kim Cheol-hun. Veteran police detective Park (Kim Seung-ho) teams up with a young, intellectual detective (Kim Seong-ok) to investigate the people surrounding Kim.

History has been kinder to the American generals of World War II - Marshall, Eisenhower, Patton, and Bradley - than to the generals of the wars that followed. Is this merely nostalgia? Here, Thomas E. Ricks answers the question definitively: No, it is not, in no small part because of a widening gulf between performance and accountability.
During World War II, scores of American generals were relieved of command simply for not being good enough.

In 1942, in Warsaw, a Polish prostitute is murdered in a sadistic way. Major Grau, a man from German Intelligence that believes in justice, is in charge of the investigation. An eyewitness saw a German general leaving the building after a scream of the victim. A further investigation shows that three generals do not have any alibi for that night: General Tanz, Maj. Gen. Klus Kahlenberge and General von Seidlitz-Gabler. They three avoid a direct contact with Major Grau and become potential suspects. As far as Major Grau gets close to them, he is promoted and sent to Paris. In 1944, in Paris, this quartet is reunited and Major Grau continues his investigation. Meanwhile, a plan for killing Hitler is plotted by his high command; a romance between Ulrike von Seydlitz-Gabler and Lance Cpl. Kurt Hartmann is happening and Insp. Morand is helping Major Grau in his investigation. The story ends in 1965, in Hamburg, with another similar crime.