Jimmy, the owner of a failed music shop, goes to work with his uncle, the owner of a food factory. Before he gets there, he befriends an Irish family who happens to be his uncle's worst enemy because of their love for music and in-house band who constantly practices. Soon, Jimmy finds himself trying to help the band by getting them gigs and trying to reconcile the family with his uncle.

A Russian prince disguised as a worker and a cafe singer secretly involved in revolutionary activities fall in love.

Mickey Moran, son of two vaudeville veterans, decides to put up his own vaudeville show with his girlfriend Patsy Barton. But child actress Rosalie wants to make a comeback and replace Patsy both professionally and as Mickey's girl.

A married singer, pianist/composer team are struggling to hit it big in New York. Finally, they audition before a Broadway producer, but the producer only wants the singer, leaving the husband without a job and feeling a failure.

In 1911, minor stage comic, Vernon Castle meets the stage-struck Irene Foote. A few misadventures later, they marry and then abandon comedy to attempt a dancing career together. While they're performing in Paris, an agent sees them rehearse and starts them on their brilliant career as the world's foremost ballroom dancers. However, at the height of their fame, World War I begins.