Freud's Last Session centers on legendary psychoanalyst Dr. Sigmund Freud who invites a little-known professor C.S. Lewis (who later wrote the children's classic The Chronicles of Narnia) to his home in London. Lewis, expecting to be called on the carpet for satirizing Freud in a recent book, soon realizes Freud has a much more significant agenda. On the day England enters World War II, Freud and Lewis clash on the existence of god, love, sex and the meaning of life.