The novel "August 31" brought the French writer Laurence Causset world fame. The mysterious white Fiat that apparently caused the car crash on August 31, 1997 in Paris's Alma Tunnel, where Princess Diana and her lover Dodi al-Fayed died, has never been found. Who was driving the ghost car and why he fled the scene of the tragedy remains a mystery. At the scene of the collision, forensic experts found the paint of the Fiat, which had crumbled from the impact, and fragments of a broken headlight, but never found the trace of the driver, perhaps the key participant in the incident. However, Laurence Causset offers a surprisingly accurate and reliable version of events. She builds a fascinating story of a young Parisian woman named Lou, the owner of an ill-fated Fiat, who unexpectedly finds herself at the center of an intrigue that turns her whole life upside down.