An unknown package delivered to Spacely Sprockets contains a robot sentry dog named "Sentro", and Spacely decides to use it to guard his "Chocolate Microchip Cookie". However, the "Galactic Sneak"-a spy for Cogswell Cogs-has pulled a Trojan-Horse-type move by hiding inside Sentro's body to infiltrate Spacely's plant. When he and Sentro steal the prototype Microchip Cookie, it's up to George Jetson-who discovers a want-ad in the news for an executive secretary for Cogswell Cogs-to become "Georgina Jetstream", infiltrate Cogswell Cogs, and get Spacely's cookie back.