The Pandora Papers leak reveals the financial secrets of the rich and powerful, exposing offshore deals and assets of over 100 billionaires, 30 world leaders, and 300 public officials. The leak includes 11.9 million files from 14 offshore service providers, making it the largest trove of leaked offshore data in history. The files show how wealthy individuals use shell companies and tax havens to hide their assets and avoid paying taxes. The leak is expected to cause political upsets and raise questions about corruption and tax avoidance.