Bess Hardemon, a tough and canny young teacher living in the mid-nineteenth century, is determined to make a difference at her new school, Priors Heath. Under the austere gaze of the Reverend Carnegie and his deputy, Miss Simms, the young girls remain underfed and unstimulated -- until the arrival of the bright, motivated young Bess.At the cost of her own chance of finding love, Bess remains trapped by her duty, a confinement echoed a century later by Sarah, a teacher at the modern-day Priors Heath who must make her own choice between her duty to her pupils and her efforts to save a broken marriage.