Max Queryat
Aurélia Maudru
Inspector Focard
Julius Zepernick
Oswald Stricker
Madame Viana
Ange Auber
Pauline
Raoul Queyrat
Willemsen
Prinz
Jeweler
A murder is committed in the building where Aurélia Maudru, inspector of the judicial police in charge of the investigation, lives.