Moe and Larry marry Shemp's overweight sisters (Lou Leonard and Maxine Gates), and discover to their horror after the vows that the girls are a couple of battle axes. After being kicked out from their place, the new bridegrooms vow revenge on Shemp for introducing them. Later, Shemp has a voice lesson with student, Fanny Dinkelmeyer since he is a music teacher. He then discovers that he has to marry a woman within seven hours to receive $500,000 from his dead Uncle's will.