During the late 15th century, a secret war plagued the cities of Italy. The Sicilian Mafia had been born and was evolving; Templar treasures scattered the countryside. In a time of turmoil, one of the greatest military engineers of history arose: Leonardo da Vinci. Weaving in Freemason secrets, he planned the defense of a city and created the most advanced military designs of an era. In this fast-paced historical fiction, the drama unfolds: Love, loyalty, death, and intrigue arise, bringing new life to the long forgotten secrets of the past.