In working together on two challenging new documentaries - South of the Border and the forthcoming Untold History of the United States - Oliver Stone, the filmmaker, engaged with author and filmmaker Tariq Ali in a hard-hitting conversation on the politics of history. Their dialogue brings to light a number of forgotten - or buried - episodes of history. From the U.S. intervention against the Russian Revolution to the connections between Presidents and the Saudi royal family, no stone is left unturned and no topic is sacred in this insightful exchange.