Mr. Planemaker's Diving Machine

Dell and Emmelisa Planemaker have just returned from a space mission to follow their dad’s trail of light, and they are off on a new adventure! Another strange-looking man turns up on the old computer warning them not to go back to Hardwareland, where they’d trained to become astronauts. Undaunted, the children cannot contain their curiosity. When a group of criminals attempt to steal money from Mrs. Planemaker, Dell and Emmelisa set about learning how to stop them. They have a lot to learn. Back in Hardwareland, they attend cyber crime courses, take scuba diving lessons and undergo submersible pilot training. With all the learning and training behind them, the intrepid aquanauts are ready to begin their next mission: to fish out the cyber criminals.