Place Des Vosges, a stones throw from Victor Hugo's apartment. A young woman is found dead from a blunt-force head wound. Jo deducts the murder was not premeditated, but maybe a crime of passion, maybe the result of a struggle an argument gone bad. She is identified as Marie-Eve Lambert, a small-time art dealer from the Paris banlieue. Her husband professes not to know what she was doing in the Marais at night. He has an alibi, though his general demeanor rubs Jo the wrong way. Maybe she was meeting a lover?