Who really murdered Mary Pinchot Meyer in the fall of 1964? Why was there a mad rush by CIA counterintelligence chief James Angleton to locate and confiscate her diary? What in that diary was so explosive? Had Mary Meyer finally put together the intricate pieces of a plan to assassinate her lover, President Kennedy, with the trail ultimately leading to the CIA? And was it mere coincidence that Mary was killed less than three weeks after the release of the Warren Commission report?