In the Name of the Pope King

In 1867 three rebels blow up the Zouaves' barracks. Monsignor Colombo learns that a brief liaison with a countess 20 years' before produced a son, one of the rebels arrested for the bombing. He uses his influence to gain the youth's release, hides him, and then engages in doomed battles of wit with the court and with the Black Pope to free the other two.