Agents of German espionage approach the wife of the Greek officer Alexis Mourouzis, and with various tricks they convince her to cooperate with them. She begins to systematically betray her homeland and convey vital information to the enemy, without fully understanding what exactly she is doing. One night, Lieutenant Colonel Mourouzis catches her photographing some secret documents and delivers her to the judge. The truth is revealed, and against her will, the traitor agrees to help her countrymen capture the German spies.