The well-known musical theme serves as an excuse for a movie joke. Houses sketched on a musical score. Laundry hanging in the yard. A mouse creeping in front of a sleeping cat. A janitor lying on a bench, a crow sleeping next to him. In the surrounding silence, you can hear his snoring and the careful moves of the mouse. Suddenly, the clatter of a broken window wakes everyone up. Along with the first sounds of music, two boys appear and immediately a chase after the cat begins.