83 year old Sigmund Freud awaits the arrival of a young Oxford professor named C.S. Lewis to his London study. As World War II descends upon Britain, a monumental clash between two great thinkers is brewing. Amid the tension and the wail of air-raid sirens, questions of love, sex, the existence of God, and the meaning of life rise to the surface. But who will gain the upper hand in what will become Freud’s Last Session?