When con man Harold Hill arrives in the sleepy town of River City, Iowa, he goes right to work convincing the townspeople that they must have a marching band to keep their boys out of trouble. Expensive instruments and uniforms follow. The only problem is that "Professor" Hill doesn't know a trombone from a treble clef and the townspeople are getting suspicious. Plus, he has made the mistake of falling for Marian, the town's spinster librarian. When Harold is forced to face the music - literally - how will he prove himself to the town and the woman he loves?
Among the musical numbers that have become favorites among American show tunes are "Goodnight, My Someone," "Till There Was You," "Gary, Indiana," "Shipoopi," and the show-stopping "Seventy-Six Trombones."