David Cohen never expected to be investigating Princess Diana's death. But after a reliable source asked him to fly to Geneva to listen to a dramatic story, he found himself on the trail of a young Englishwoman tragically out of her depth in the company of drugs dealers, arms dealers and secret service operators. Here, for the first time, Cohen reveals answers to some of the most troubling questions surrounding the events of that fateful car crash in Paris. He discloses why the Mercedes was taking the wrong route to Dodi Al Fayed's flat. He uncovers incriminating information about the owner of the infamous white Fiat Uno. He reveals Henri Paul's true role on behalf of MI6. And he explores the mysterious cult, the Order of the Solar Temple.