Four Corners will take you inside the secretive world of tax havens where corporations and the wealthy operate far from public view. In an investigation that spans the globe, Four Corners will reveal the lengths some of the world's most powerful business figures and global corporations are going to, to avoid paying tax. “We're seeing things that people never thought would see the light of day." As tax authorities in Australia and across the globe try to claw back money from the big multinationals, reporter Marian Wilkinson will show how a web of offshore operators help organise elaborate international tax avoidance schemes.