Ben Thompson, clever cat, has always been curious about his friend Sergeant. Sergeant is so serious and so dedicated to his work, and he works all the time. Ben wonders what it would be like to be the steadfast watchdog of the Junkyard. One day, when Sergeant comes to the Junkyard with a bandaged foot, Ben gets to experience first hand what it is like to be the watchdog — with all its responsibility and reward!