Somewhere in Beverly Hills, in the house of Jack Benny (a sign out front proclaims, "Star of Stage * Screen * Radio * Television...also cartoons"), a mouse version of Jack is practicing his violin—off-key—and saying to himself, "Who is this guy Isaac Stern?" (In real life Benny and Stern were good friends.) Outside Jack's mouse hole, a cat is lying in wait, wearing ear muffs to filter out the discordant sound of Jack's violin.