 Short documentary film which features the activities taking place in London s famous "Street of Song" (Denmark Street) - also known as "Tin Pan Alley." The idea of the film is to lift the veil and show cinema audiences just how a new number is created and set upon the road to success. The song in question is "Last Night s Kisses" by Sam Brown, Ray Hartley and Jimmy Kennedy. To help launch the song, stars come from far and near and are seen trying it out and discussing its possibilities.