After barely surviving the trenches of World War I, an embittered young soldier takes a teaching post at Bamfylde, an elite boarding school in the uplands of West Devon. It is an unlikely job for a Welsh miner's son without a degree, but David Powlett-Jones (John Duttine) proves to be a rare schoolmaster, as passionate about learning as he is about teaching. Through two tumultuous decades, Powlett-Jones inspires his students with his courage and idealism, qualities that help prepare him to send another generation of young men off to fight yet another war.