Europe’s smallest country - the Vatican, led by the pontiff - is one of the most powerful states on the planet, a moral compass for more than a billion people. However, over the past decades, the Catholic Church has suffered a number of scandals and its congregations are crying out for change. Pope Francis came with the promise of change. But while addressing issues plaguing mankind, what kind of battle is he forced to wage in the Holy See? Are the highest clergy against him, or have they joined his cause? For centuries, the Vatican has been shrouded in mystery, its internal deals secreted behind closed doors. However, one person managed to get through and came back to tell his story. Investigative journalist, author of ‘Merchants in the Temple’, Gianluigi Nuzzi, is on Sophie&Co today.