Washington, DC, 1944. Gene Summers, a young
U.S. Army Air Force ex-bombardier who speaks French fluently, is selected for a mission in Nazi-occupied Paris, where he will assassinate a supposed double agent, Marcel Lafitte, working in the
French Resistance. He travels home to
Boston to visit his mother before being transferred to England for rigorous training. Summers is then dropped into France. He makes his way to Paris, where he meets his Resistance contact, Léonie, a dressmaker. She provides Summers with identity cards for use once he has completed his mission, the plans for which she must be unaware, lest she is ever interrogated. Summers, however, after observing and then unexpectedly meeting Lafitte at a café, experiences second thoughts about his mission. Lafitte is gentle, polite, friendly, and intelligent. He has a wife and daughter whom he obviously loves, and he also dotes on his pet cat, Mimieux, protecting her from harm at a time when cats are being killed and eaten due to food shortages. At a subsequent meeting, with curfew drawing near, Lafitte apparently saves Summers from being detained by German troops (who are hunting a Resistance assassin) by allowing him to take shelter in his office. Summers' misgivings deepen and he begins to doubt Lafitte is a double agent. Summers reveals all this to Leonie, but she rebukes him sharply, reminding him that he would not have been ordered to kill without reason. His confidence regained, Summers prepares to kill Lafitte. Returning to his office, he cracks a blunt object over the man's head, but the blow merely stuns him. The stricken Lafitte turns over to look directly into the eyes of Summers. He then utters a single word: "Why?" In a panic, Summers stabs Lafitte with a pair of scissors, killing him. He then steals money from Lafitte's table, attempting to make the scene look like a robbery. Narrowly escaping the Gestapo, the distraught Summers hides the money in a cemetery. He tries to contact Léonie, but it is too late. The Nazis have captured her. Racked with guilt, Summers steals off into the night. Several months later, after Paris has been liberated, Summers is recovering in a military hospital. After the assassination, he had retreated into alcoholism, spending the money he stole from Lafitte to finance his habit. Summers learns that Léonie was killed by the Nazis after her capture. At first, the Army tries to convince him that Lafitte was guilty and that many lives were saved by his death. However, Summers is not convinced and insists on knowing the truth. It is finally revealed that Lafitte was, in fact, innocent. Summers leaves the hospital to visit Lafitte's wife and daughter, who are now impoverished. Unable to tell them all the facts behind Lafitte's death, Summers instead praises Lafitte as one of the Allies' best Resistance agents. He then offers them his own back pay, which they gratefully accept. ==Cast==