In Florence, at the time of Lorenzo de' Medici, known also as Lorenzo the Magnificent, the aristocrat brothers Chiaramantesi rule with an iron fist the streets of the city. Ruthless and fierce, the two brothers have chosen as their special victim the innocent and harmless Giannetto. Even though determined to not react to the cruel pranks of the brothers, Giannetto is forced to take a stand when Ginevra, a beautiful girl that works in the Chiaramantesi household, is dragged into the game. To defend his honor and protect the girl, Giannetto works out a fiendish plot that will end in blood and madness. No one will ever be able to forget the night of the jester's supper.