After surviving a fierce typhoon, Jack, Billy, Betty, uncle Jim, and their native helper Michel drop anchor and get out their auto gyro. As the Spindrift rests in the peaceful waters, the flying machine is inspected, and made ready to hunt for their sunken treasure of uranium. Though secrecy is important to their mission, Betty worries that their position has been reported, and time won’t be on their side.
Sure of their position, uncle Jim feels their search, and dive will go well, and isn’t concerned about their rival ship, the Shark, finding them. Enjoy the ride with Jack and uncle Jim as they fly, hover, and perform other amazing moves as they search for the hidden reef.