A frustrated pianist himself, music journalist Myles Clarkson is thrilled to interview virtuoso Duncan Ely. Duncan, however, is terminally ill and not much interested in Myles until noticing that Myles' hands are ideally suited for piano. Suddenly, he can't get enough of his new friend, and Myles' wife, Paula, becomes suspicious of Duncan's intentions. Her suspicions grow when Duncan dies and Myles mysteriously becomes a virtuoso overnight.
At the home of Viennese composer Johann Strauss lived Johann Mouse. Whenever the composer played his waltzes, the mouse would dance to the music, unable to control himself. One day, when Strauss was away, the house cat played his master's music. When word got out about a piano-playing cat and a dancing mouse, they were commanded to perform for the emperor.
Jerry Mulligan is an exuberant American expatriate in Paris trying to make a reputation as a painter. His friend Adam is a struggling concert pianist who's a long time associate of a famous French singer, Henri Baurel. A lonely society woman, Milo Roberts, takes Jerry under her wing and supports him, but is interested in more than his art.
