The book investigates the dark underbelly of Belle Époque Paris and the sensational theft of the Mona Lisa. The narrative explores the city's transformation at the turn of the 20th century, highlighting its role as a hub for artists and intellectuals while simultaneously confronting its reputation as a violent and criminal metropolis. It focuses on the 1911 theft of the Mona Lisa from the Louvre and the subsequent investigation led by the pioneering detective Alphonse Bertillon, who controversially suspected Pablo Picasso.

This book offers a compelling look into a notorious art heist and the societal context of its time. The narrative weaves together historical fact with the intrigue of a high-profile investigation, drawing readers into the atmosphere of Belle Époque Paris. It highlights the methods of early forensic science and the challenges faced by detectives in solving complex crimes. The inclusion of figures like Picasso adds a layer of fascination, making the historical account engaging for a broad audience.