Two Americans, Abbott and Costello, who are stranded in Cairo, Egypt, happen to overhear Dr. Gustav Zoomer (Kurt Katch) discussing the mummy Klaris, the guardian of the Tomb of Princess Ara. Apparently the mummy has a sacred medallion that shows where the treasure of Princess Ara can be found. The followers of Klaris, led by Semu (Richard Deacon (actor)), overhear the conversation along with Madame Rontru (Marie Windsor), a businesswoman interested in stealing the treasure of Princess Ara.