The first of September, 1939. Sigmund Freud, the world renowned psychoanalyst awaits the visit of soon to be legendary author C.S. Lewis on the day World War 2 is declared. Lewis, a former atheist turned Christian is expecting to be taken to task for his recent satirisation of Freud in a book. However, the impending war and Freuds failing health catalyses a far deeper conversation as they clash about the existence of God, love, sex, and the meaning of life.