The papal conclave is a succession drama like no other. Triggered by the death of Pope Francis, 135 cardinals descend on the Vatican to elect his successor. But these cardinals are not just electors - they are candidates too. One of these 133 men will become pope. It is an ancient ritual of prayer and isolation that determines the future of the Catholic Church - and it all unfolds in secrecy. With unprecedented access to the Vatican, Secrets of the Conclave offers a rare insight into a solemn ceremony that has decided the Church's leadership for centuries.