One-act opera composed in 1911 but not performed until 1918 and set in a gloomy castle with seven locked doors. Judith and Bluebeard arrive at his castle, which is all dark. Bluebeard asks Judith if she wants to stay and even offers her an opportunity to leave, but she decides to stay. Judith insists that all the doors be opened, to allow light to enter into the forbidding interior, insisting further that her demands are based on her love for Bluebeard. Bluebeard refuses, saying that they are private places not to be explored by others, and asking Judith to love him but ask no questions. Judith persists, and eventually prevails over his resistance. Behind each door is a secret which finally overwhelms Judith.