Max Montezuma is a soldier descended from an ancient Aztec emperor. Max stumbles across a deserted, uncharted island, and accidentally crashes his plane on it. Prior to Max's arrival, the island is undiscovered. Max only has a flashlight, canteen, and an entire lost Aztec civilization before him. He must restore the desecrated tomb of his ancestors, discover the link between the ancient Aztecs and a race of saucer-flying aliens, and more, in his adventure.
Source: Wikipedia, "Montezuma's Return", available under the CC-BY-SA License.