From back cover: It is the Italian Renaissance during the corrupt reign of the powerfulMedicis. Doctor Who, angry because he was forced to land on Earth by the incredible Mandragora Helix, walks right into a Machiavellion plot. The unscrupulous Count Frederico plans to usurp the rightful rule of his naive nephew. This, with the help of Hieronymous, influential court astrologer and secret cult member.
Intent on righting all wrongs, Doctor Who studies their political maneuvers. He uncovers a larger, even more malevolent plot- a plot to rule not only San Martino Province, but the entire world! Hieronymous has been taken over- both in mind and body- by the Mandragora energy ball, an alien, but all-powerful intelligence. Using Hieronymous and his cult members as a bridgehead, the Mandragora Helix intends to conquer Earth and dominate its people!