On August 31, 1997, the world stopped. Millions of people right across the globe wept as they learned of the tragic death of Princess Diana. Diana's car had hit a concrete pillar at high speed in the Pont De L'Alma tunnel in Paris. Her driver, Henri Paul, had consumed alcohol, but what other factors led to the accident? To this day Diana's untimely and tragic death is shrouded in mystery, with many questions still yet to be answered with any degree of certainty. What really happened on that fateful night? What happened to the mysterious white Fiat that police believed caused Diana's Mercedes to skid out of control? Neither the car nor its driver have ever been seen again. Was Henri Paul really drunk? There is no evidence to suggest he was under the influence of alcohol. Was this merely a traffic accident or was Princess Diana's death in fact a perfectly planned assassination? This exciting film goes underground in Paris, in search of the truth and new evidence that throws light on a tragedy that echoes to this day.