1879, York. Greta Costello must rely on her wits to survive. She finds refuge as a Saturday girl for an old jeweller, Saul Abrahams, and her eye for detail, her long fingers and appreciation of beauty persuade Saul to train her as a pearl stringer. This skill will lead her through hardship and pain towards a new life. 1879, Scotland. Jem Baillie knows the immense power of a perfect pearl. His father was a fisher on a tributary of the Tay river in Perthshire, Scotland, and together they found the rarest of pearls, a great white pearl they call Queenie. When this is stolen from them, Eben vows revenge. Spanning generations and continents, tracing the rivers of Scotland and the Mississippi.