When Mysto the magician is throw out of a theatre after trying to promote himself and his act for the stage, he decides to get revenge on the pompous tenor Poochini (Spike the Bulldog) who rejected him. Replacing the conductor and using his wand in place of the baton, he proceeds to use his magic to put the tenor through some bizarre, rapid-fire, torments while he tries to perform “Largo al Factotum.”