A young Irishwoman comes to the United States to live and work with her mother as a cleaning lady at Carnegie Hall. She becomes attached to the place as the people she meets there gradually shape her life. The film also includes a variety of performances from some of the foremost musical artists of the times: conductors Bruno Walter & Leopold Stokowski, solists Arthur Rubinstein & Jascha Haifetz, singers Lily Pons & Jan Peerce and bandleader Vaughn Monroe among many others.

In Hoyt City, a statue of founder Ethan Hoyt is dedicated, and 100 year old Hannah Sempler Hoyt (who lives in the last residence among skyscrapers) is at last persuaded to tell her story to a 'girl biographer'. Flashback: in 1848, teenage Hannah meets and flirts with pioneer Ethan; on a sudden impulse, they elope. We follow their struggle to found a city in the wilderness, hampered by the Gold Rush, star-crossed love, peril, and heartbreak. The star "ages" 80 years.