This episode begins with the Quest Team flying in the Andes. Their plane begins to have some difficulties and they land at this castle in the mountains. There they meet the mysterious Baron von Froelich and his mute servant. If this premise isn't odd enough, the episode eventually leads to a dogfight between Race and the Baron in the sky above the castle.
Despite the strange premise, the episode works surprisingly well.
An interesting side note, Baron von Froelich, along with some other one-shot villains, was originally intended to appear as a hologram in the 'Real Adventures of Jonny Quest' episode "Race Against Danger." This idea was, however, eventually scrapped.