Warwickshire, 1840s: boys are destined for the pit and girls for the mill. Despite this, Maryann is happy there – until her mother dies. Her family collapses, leaving Maryann exhausted, and Toby, the boy she is set on marrying, insists they wait. Then Maryann is offered a position as nanny to the daughter of the mill owner, Wesley Marshall, who Maryann grows unexpectedly close to. But their relationship doesn't go unnoticed, threatening to unleash a world of problems on them all...