Twenty years ago, the brash Texan energy company Enron collapsed after its massive fraud was finally exposed. Investors and pension funds worldwide lost billions of dollars. The case was meant to signal a sea-change in the way businesses were policed. How difficult would it be to weave a similar web of financial deceit today? Lesley Curwen travels to the dark side of business to find out whether it is still just as easy to fleece investors – which in the end means us – out of our money.