While rummaging through his attic, the Pink Panther comes across some old letters. He reads one from an old Army buddy, "Loudmouth Louie," who recalls the old days, such as when they first joined the service. We hear Louie's voice and Brooklyn-type accident (i.e. "soivice" instead of "service.").
The rest of the cartoon is the PP reading more of the letter, us hearing Louie, and quick rehashes of visuals depicting what Louie is talking about. As another reviewer points out here, these flashback segments are reruns from previous Panther cartoons. That is an insult to the viewers. The Three Stooges did this a number of times in late '40s cartoons and it's a cheap way to present a story.
Since I own three DVDs that have all these previous Panther segments, I found this one a total waste of time. The producers of this fine animated series ought to be ashamed of themselves, passing this one off on the public.