Marianne (Helle Virkner) er ekspeditrice i den elegante modebutik Chez Madame på Strøget. Hun er en grå mus, og da den rige verdensmand John Bagger (Poul Reichhardt), en af butikkens kunder, inviterer hende ud nytårsaften iklædt butikk...
Marianne is a sales assistant at the elegant fashion boutique Chez Madame on Strøget. She is a wallflower, and when the wealthy man of the world John Bagger, one of the store's customers, invites her out on New Year's Eve wearing the store...