If Letty Montressor had not been quite so determined to escape from her family and marriage to the odious Mr Sludge, she would not have been found wandering the streets of London late at night with no other companion but her canary. Harry Tyne, the disgraced heir of Lord Aubrey, has no choice but to rescue the lovely girl with the silvery voice and he carries her off to Vienna. Letty is soon the toast of Europe's glittering high society, yet still she demands more. But in her desire to clear Harry of the scandal attached to his name, Letty discovers too late that she is walking into a carefully prepared trap...