In the summer of 1941, Hitler invaded the Soviet Union, breaking an alliance that Stalin considered invulnerable. There were well-founded fears that either Stalin's forces would suffer a crushing defeat or the Soviet leader would once again come to some sort of understanding with Hitler. Either scenario would mean disaster for both Britain and the United States.

This is where Averell Harriman comes in: a railroad tycoon and, at the start of the war, the fourth richest man in America. At Roosevelt's request, he travels to Britain to act as a liaison between the American president and Churchill, as well as to lead an effort that would eventually become known as the Harriman Mission. In collaboration with his socialite young daughter Kathy, the support of a very special group of British diplomats, and Churchill himself, Harriman will eventually succeed in persuading Stalin to cooperate with the West, a move essential to defeating Hitler.

Based on unpublished diaries, letters, and secret reports, the book "The Stalin Case" brings to light unknown material about the path the Allies took to achieve victory, incorporating a multitude of vivid scenes between prominent and notorious figures of World War II.