1500 A.D. Florence, Italy. A fine spring morning in one of Italy’s most powerful city states. Sandro, wakes up in the Brancacci chapel after another sleepless night wandering the streets trying to escape his nightmares and the jealousy of his fellow apprentices. He may be Leonardo’s most talented apprentice but his lack of dedication frustrates the Maestro. He is late. He promised to meet his friends Filippo and Maria on the steps of the Pallazzo Vecchio. Filippo is a penniless but dedicated apprentice of Michelangelo who hopes one day to be successful enough to ask for Maria’s hand in marriage. The city has turned out to welcome the victorious papal army led by the pope’s son Cesare Borgia. Some whisper that he murdered his own brother so as to replace him as leader of the papal army charged with making sure the towns of the Romagna district pay their dues to pope Alexander. Filippo reminds Sandro that Leonardo, Borgia’s military engineer, will be in the procession, when they spot a group of richly dressed prisoners, relatives of rich families that Borgia has taken for ransom. Among them is Madonna Lisa del Giocondo, the wife of a rich merchant. Mona Lisa has no idea that she will attract the attention of Borgia who will keep her under guard in a nearby house. Fascinated and trying to please her, he will commission Leonardo to paint her portrait when all she wants is to be returned to her husband. As Leonardo starts the portrait Sandro learns she is married to a rich man and persuades Filippo that they should kidnap her and claim the ransom money for themselves. They start on an adventure which will test their friendship to the limit and involve them in the Magione conspiracy, a plot to get rid of the pope’s son. Sandro, who is trying to come to terms with his own feelings for Mona Lisa, will need the help of Leonardo as the boys finally come face to face with Cesare Borgia himself. That foot I hear on the stair could be one of Borgia’s guards or even Michelotto himself, almost as cruel and ruthless as his master Cesare Borgia…I dare say no more…