Cesare recruits a band of mercenaries with the help of Micheletto to seek revenge on the retreating French troops for burning the nunnery where his beloved Ursula lived; the Pope forges more strategic alliances and enriches himself in the bargain; Lucrezia joins Giulia's quest to aid Rome's poor.

Alexander is convinced that a lightning strike on St. Peter's Basilica during mass was a sign of God's disapproval; Cesare tries to prove his worth as a military commander; the Pope pressures the reluctant Lucrezia to enter another political marriage.