A thrilling exposé revealing how Opus Dei - a secretive, ultra-conservative Catholic sect - pushed its radical agenda within the Church and around the globe, using billions of dollars siphoned from one of Europe's largest banks. For over half a century, Banco Popular was one of the most profitable banks in the world - until one day in 2017, when the Spanish bank suddenly collapsed overnight. When Gareth Gore was dispatched to report on the story, he uncovered one of the most brazen cases of corporate pillaging in history, perpetrated by a group of men sworn to celibacy and self-flagellation. Drawing on unparalleled access to bank records, insider accounts, and exclusive interviews with whistleblowers from within Opus Dei, Gore reveals how money from the bank was used to lure unsuspecting recruits - some of them only children - into a life of servitude. He also tracks the ascent of Opus Dei around the globe, exposing its role in bankrolling many right-wing causes, including the US Supreme Court's overturning of Roe v. Wade. In Opus, Gore tells a shocking story of money and power that spans decades and continents. Documenting Opus Dei's secret history for the first time, this thrilling work of investigative storytelling raises important questions about the dark forces that shape our society.