In the deepest, darkest corner of Venice a lonely mouse called Marcello longs for the music and excitement of a masked ball, but there's just one problem. Marcello is not invited! But with a leap and a hop and a flick of his tail (and a rather cunning disguise) he bravely slips into the GrandPalace. A dangerous decision for a little mouse, to gatecrash a pussycat ball...