It's Christmas 1856 and Haworth is in the grip of a freezing winter. Charlotte, Emily and Anne Bronte are rather losing interest in detecting until they hear of a shocking discovery: the bones of a child have been found interred within the walls of a local house, Top Withens Hall, home to the scandalous and brutish Bradshaw family. When the sisters set off to find out more, they are confronted with an increasingly complex and sinister case, which leads them into the dark world of orphanages, and onto the trail of other lost, and likely murdered children.