The Institute for Religious Works, better known as the Vatican Bank, sits behind some of the thickest walls in Rome, both physically and financially. This film tracks the events of April 2011, when the Holy See introduced new rules meant to bring its finances into line with international anti-money-laundering standards after years of scandal and suspicion. Interviews with bankers, journalists, and Vatican watchers lay out how the IOR came to hold accounts for religious orders, dioceses, and, according to critics, people with far less pious reasons for wanting an account outside normal banking oversight. The film traces the institution's history back through Cold War-era controversies and asks whether a sovereign state the size of a city block can really police itself. Archival footage of Vatican City and St. Peter's Square frames a story that is less about faith than about the mechanics of a bank that answers to almost no outside authority, and what changed, if anything, once the doors were forced open.