The Blue Paradise is a musical in a prologue and two acts, with music by Edmund Eysler, Sigmund Romberg and Leo Edwards, lyrics primarily by Herbert Reynolds, and a book by Edgar Smith, based on the operetta Ein Tag im Paradies (A Day in Paradise, 1913) by Eysler with original text by Leo Stein and Bela Jenbach. The story is set in a Viennese cafe, where a man realizes that he cannot recapture his long lost love.