From the 15th century, until its disappearance in 1921, its history can be documented. Ever since, its trail remains hidden. This film tracks the story of this remarkable diamond and seeks to determine if it still exists. There are witnesses who claim to know where it is today

We will follow every lead and attempt to discover its fate. In the film, we will question witnesses and follow leads to shed light on the “Florentine” mystery. We will try to determine what has happened to it, to whom it belongs and why its owner prefers to remain hidden.