The story sees brother and sister Tom and Ellen Bowen as stars of a show Every Night at Seven, a Broadway success. They are persuaded to take the show to London, capitalising on the imminent Royal Wedding. On the ship, Ellen meets and quickly falls in love (a habit with her) with impoverished but socially well connected aristocrat Lord John Brindale. Whilst casting the show in London, Tom falls in love with a newly engaged dancer, Anne Ashmond. Tom assists Anne to reconcile her estranged parents and also asks his agent to locate Anne's supposed fiancee in Chicago – only to discover that he's married.
Carried away by the emotion of the wedding, the two couples decide that they will also be married that day.