Par locales the film on a nameless Caribbean isle which can be identified as Trinidad, inasmuch as it boasts Calypso singers. Mary Martin, playing an ex-hatcheck gal at the Rainbow Room, NY, arrives on the isle with a small b.r. amassed for the purpose of allowing her to act the wealthy lady and catch a wealthy husband in the process.Plot [adapted by John Jacoby from a story by Michael Uris] is no heavyweight affair, but provides all that is necessary for a musical of this type. It keeps things moving at a fast pace and offers the chandelier on which the tunes can be hung. Martin capably handles the ballad department, with an occasional assist from Dick Powell, while Betty Hutton, of course, is hot on the jive. They divide up six numbers by Frank Loesser and Jimmy McHugh.