Spitfires of Avalon is the story of a young man, Jonah Bentley, who goes to England in 1941 and joins the Royal Air Force (RAF). His wingman, David Hill, introduces Jonah to his sister, Barbara Hill. Jonah and Barbara fall in love, and romance blooms as the two meet and talk at the top of Glastonbury Tor—the supposed historical site of Avalon. Then David is shot down over France, and Barbara, emotionally drained, leaves Jonah. Jonah is heartbroken and seeks answers in his Spitfire aircraft and at the Tor.