Mariel Baxter, a famous American soprano, has suddenly cancelled all her recitals & flown to Vienna. In the 1980s she came to the city to study the art of lieder singing with the reclusive Ursule Kroll, one of the brightest stars of the Nazi era & a favourite of the Fuhrer himself. The two haven`t communicated since Mariel`s unexpected departure over twenty-five years ago. So why has Mariel come back? As they play a vicious cat-and mouse game, terrible revelations & recriminations about the past slowly begin to unfold & Mariel & Ursule soon discover that some secrets are better left buried.