Isabella and Marco are on their way to Venice. During the stay in Florence, Isabella meets Jacopo Pecori and Eleonora da Toledo. Bought of them have an unusual request. Will Isabella be able to satisfy them? The series “Lady Isabella’s Secrets” tells the story of Lady Isabella Cortese, an alchemist living in the mid-16th Century who authored a unique compendium of alchemy recipes. “Ancient Cinnabar” continues the story begun in the first volume “White as the Jasmine Flower”, published in 2016.