Roman Polanski's next movie is set 2,000 years ago, but it will still have plenty to say about the modern world, the French-Polish director is promising.The Oscar winner is currently working on the screenplay for the film adaptation of Pompeii, British writer Robert Harris' novel about the ancient Roman city buried by the 79 AD Mount Vesuvius eruption. The focus of the story is Marcus Attilius, a fictional engineer in charge of Pompeii's Aqua Augusta aqueduct who realizes before anyone else that the volcano is about to blow.