Ernest Rides Again

That lovable know-it-all knucklehead Ernest P. Worrell, who is working as a janitor at a local college, meets a history professor named Dr. Abner Melon. After discovering an antique metal plate near a construction site, Ernest shows it to Dr. Melon, who believes that it came from a giant Revolutionary War cannon called "Goliath", (named after the legendary biblical giant). Dr. Melon had previously been ridiculed by his peers for theorizing that the real Crown Jewels of England were stolen during the Revolutionary War and were actually hidden inside the long-lost cannon.