Sylvie Pelletier recounts the story of leaving her family's snowbound mountain cabin to work in the local manor house for the Padgetts, owners of the marble mining company that employs her father and dominates the town. Outside the manor walls, Moonstone is roiling with discontent. A handsome union organizer, along with labor leader Mary Harris "Mother" Jones, is stirring up the quarry workers. The editor of the local newspaper, a bold woman who takes Sylvie on as apprentice, is publishing unflattering accounts of the Padgett Company. Threats of violence permeate the air. Sylvie navigates between vastly different worlds, and struggles to find her own voice amidst conflicting loves and loyalties. When the harsh and dangerous winter brings tragedy, Sylvie must choose between silence and revenge.