Fizz wants to be a police dog. He's brave, clever and super-fast, but Fizz doesn't look like a police dog. His family are show dogs and companion dogs, not working dogs. Fizz longs for adventure, and he's determined to try out at the Sunnyvale City Police Station. There, he is the smallest, fluffiest dog in the line-up, and he meets fierce Amadeus, who definitely wants to be top dog.