Boston, 1930: Montana Jones and his cousin, Professor Alfred Jones, travel around the world searching for lost treasures to bring them to museums. Alfred's mentor, Professor Gerrit, helps them by sending LPs with information. On one trip, they meet Melissa, a wealthy reporter who speaks nearly all languages. She accompanies the two on their trips. Their opponent is Lord Zero, a rich, bizarre art lover and master thief. Lord Zero has two henchmen: Slim and Slam. There is also the inventor Dr. Nitro, who invents strange engines to help find treasures.