Cesare's new mistress could trigger a diplomatic indecent, and public allegations of debauchery are made against the Borgia family.

When one of his commanders captures a city without authorization, Cesare must appease a ruler. Lucrezia's son suffers a potentially mortal fall.

While Rodrigo engages in delicate politics, Leonardo da Vinci offers Cesare a powerful weapon and murder visits the Borgia family.