In seventeenth-century Italy, behind the elegant doors of palazzos and the whispered conversations of candlelit courtyards, a deadly secret begins to spread.

Giulia Tofana is a woman who understands that appearances can be deceiving. In a world where wives have little power over cruel and abusive husbands, she creates a mysterious potion that becomes known as Aqua Tofana-a slow-acting poison designed to leave few obvious clues behind.

Soon, desperate women begin seeking Giulia out. To them, she is not merely a poisoner, but a secret ally-a woman willing to give them the means to escape marriages from which there seems to be no other way out. Each tiny bottle carries a terrible promise: freedom at a price.

But as the deaths accumulate, whispers become suspicions.

Authorities begin searching for the source of the mysterious poison, while Giulia finds herself caught between the women who depend upon her and the ever-tightening net around her. Was she a ruthless murderer, a criminal entrepreneur, or a dark savior to women trapped in lives of misery?

In a society where husbands held the power of law, Giulia Tofana created a weapon that could be hidden in plain sight-and changed the lives of countless women forever.

A tale of poison, desperation, secrecy, and revenge, inspired by the notorious legend of one of history's most infamous poisoners.