The Laurel &amp. Hardy Moving Co. have a challenging endeavor on the hands (and backs): hauling a new player piano up a monumental flight of staircase to Prof. von Schwarzenhoffen's house. Their task is complicated by a sassy nurse maid and, unbeknownst to themthe impatient Prof. von Schwarzenhoffen himself. But the greatest problem could be the force of gravity, which repeatedly pulls down the piano . At length, the irate Professor explodes in fury to discover the"mechanical blunderbuss" in his home, perhaps not knowing it had been a surprise birthday gift by his wife.