Once again, Shaggy Rogers is showing a classical music collection to Josie and the Pussycats. This time, it is classical music from the 18th and 19th centuries. As is implied, Mystery, Inc. is traveling with the band again. The destination is the trenches of World War I where the Pussycats are going to film a music video. When they arrive, there is trouble. The Ghost of the Red Baron is haunting the skies above the trenches. The members of Mystery, Inc. are hard-pressed to stop him. But can any of the mystery solvers stop him?
This episode is based on an episode of The New Scooby-Doo Movies called The Ghost of the Red Baron. The names of the suspects and the culprit are also from that episode. However, Mr. Siegfried is given a first name in this episode.