Based on a true story, C.S. Lewis is a world-renowned writer and professor. Unmarried, he leads a gentleman's life filled by intellectual pursuits, until he meets Joy Gresham. Joy is a feisty, abrasive, intelligent New York divorcee whose sharp-edged, no-nonsense attitudes take Lewis by surprise. Bursting unexpectedly into Lewis's world, Joy shocks his associates and awakens Lewis to deep emotions he has written about, but never experienced. He slowly opens his heart to this woman and experiences love on a whole new level. But life is made up of delicate balances, and Lewis must confront a difficult truth: "that a heart awakened to great love is also opened to great pain."