Adapted from the best-selling book "God's Question" by Armand Negri, a doctor from Harvard University, the play tells the story of how psychoanalyst Sigmund Freud, in his later years, invited a young and unknown British professor CS Lewis to his home in London. The two began to study and discuss a book recently published by Freud. The two, who became more and more speculative as they talked, exchanged their respective values on the existence of God, love, sex and the meaning of life. However, at that time, World War II broke out. Dr. Freud, who was Jewish, could no longer bear the double blow of cancer and the loss of his relatives and soon died. This conversation also became the last precious wealth that Freud left to the world.