Hogan and Co are in the rec hall when Klink announces a special privilege: they will be allowed to record a personal message to send home to their loved ones. Of course, there is a catch: they can only send the messages that Klink has written for them, which paint a rosy picture of their life at Stalag 13.
Just then, the SS arrives. Hogan and Co are suddenly turned out of the rec hall along with the recorder, and Hogan wants to know why. He works on Schultz, who reveals that it is on the orders of General Burkhalter, who wants the rec hall for Colonel Schneider. Hogan then goes to work on Klink. He discovers Schneider is the new liaison air force officer, and the meeting is going to discuss the Luftwaffe ground-support plan and brief officers on the German war offensive.
Now they have to find a way to listen in on the meeting as they have no tunnel or microphone for the rec hall. They try to string a wire across to the rec hall to plant a microphone, under pretext of it being a washing line. But the SS guards dump the wire and washing on their doorstep. Then they hear Schultz singing in the shower and Hogan gets an idea. He tells Schultz that he has a singing talent that could make a fortune, and he wants a recording of his voice for Newkirk's uncle, a big impressario. They wangle their way into the rec hall with the recorder to record Schultz's voice. Klink catches them. He gets ideas about getting his violin music recorded for Newkirk's uncle. He has Hogan and Baker take the recorder (actually, it is just the box - the recorder is in the rec hall) back to his office, for them to record Klink playing in Mozart's D-Major quartet. Klink's violin music has everyone wincing. At the same time, the meeting gets underway in the rec hall - and so does the secret recording. Later, Hogan gets the signal that the recording went well. After the meeting is over, Burkhalter interrupts the string quartet. Klink explains, and insists that Burkhalter hear the recording. Hogan covers with the wholesome record of Mozart's D-Major quartet from Klink's collection.
Two weeks later, Klink wonders why he has not heard back from London about his recording. Hogan suggests current favorites might be more preferable and gives Klink a list (of Allied favorites). Meanwhile, Burkhalter and Schneider are back in camp, discussing the heavy losses they have suffered from American Air Corps during the Luftwaffe plan. Burkhalter says he never wants to hear about the American Air Corps again. Just then, he hears Klink playing the Army Air Corps song. He and Schneider storm into Klink's office. So, the moment Klink finishes and turns around....