Quick recap
The Pope dies, and Camerlengo Patrick McKenna runs the Vatican during the conclave. At CERN, someone steals a sample of antimatter, and the four leading cardinals are kidnapped by someone claiming to speak for the Illuminati: one will die every hour, and at midnight the antimatter will blow. Langdon and scientist Vittoria Vetra follow the Path of Illumination through Rome's churches. Three cardinals die, but Langdon saves Baggia at Piazza Navona. McKenna flies the antimatter up in a helicopter and jumps before it explodes. Hidden cameras show he planned it all to become pope. Exposed, McKenna takes his own life. Baggia becomes Pope Luke, and Langdon is handed Galileo's book.

