With Pope Pius XIII in a coma, Cardinal Voiello makes an unpredictable move during the deadlocked papal conclave, causing chaos.

Voiello, Guiterrez, Assente, Aguirre and Sofia make a trip to the UK to appeal to the alluring but fragile Sir John Brannox.

Brannox reflects on his past before taking on the role of Supreme Pontiff; Ester meets a widower who offers a financial solution.

Brannox decides to pay a visit to Pius XIII; Voiello prepares for a long war with Sister Lisette.

A brutal act of terrorism in France leads to an unconventional response from the pope that strikes a chord with the public.

A confrontation with Spalletta leads Brannox to deliver unwelcome news to Voiello; Sofia learns what her husband has been keeping from her.