London, 1939. On the eve of the Second World War the father of psychoanalysis, Sigmund Freud (Anthony Hopkins), host Oxford don and committed Christian C.S. Lewis (Matthew Goode) at his Hampstead home for a debate over the existence of God. 

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Exploring Freud's unique relationship with his lesbian daughter Anna and Lewis' unconventional romance with his best friend's mother, the film interweaves past, present and fantasy, bursting from the confines of Freud's study on a dynamic journey.

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Based on Mark St. Germain's play (who also co-authored the screenplay) and directed by Matt Brown (The Man Who Knew Infinity), Hopkins and Goode deliver crafty and moving performances as two of the 20th century’s great minds, whose intellectual sparring demonstrates both men’s formidable strengths and emotional vulnerabilities as  the drumbeat of war grows louder in the distance.