The Planeteers are present for the testing of JASON, a robot that observes wildlife and the environment, and transmits the data to its home base. The tests are being done on the Galapagos Islands, which is where Hoggish Greedly, Verminous Skumm and his rats have crash landed, since their ship was thrown off course from a storm. Now, they're hungry, and consider feasting on tortoise eggs to fill their appetites. The Planeteers must fly to the Galapagos to save the eggs, and remove the rats from the environment to restore the balance of its ecosystem.