The boys are hired to clean Madame Gretshnikov's musical instrument shop, but have to do so quietly, while she rehearses for an audition at the opera. Mack gets a crack on the head for putting a crack in a "very valuable" record. Myer swallows a pitch pipe, so Mack "plays" him by pressing different parts of his chest, and a customer gets showered with sheet music. After Madame leaves for her audition, Mack plays piano and Myer sneezes in accompaniment to the tune of "While Strolling Through the Park One Day." Madame returns and tells the boys to "wreck the store" because she got the part, but the opera calls back to tell her they reconsidered because her voice is too loud. Unfortunately, Mack and Myer have already started demolition.
—Steve Lally