It is 1824, and the seaside resort of Lyme Regis is teeming with visitors seeking fun and pleasure for the summer. When 22-year-old Harriet unearths the fossilised bones of a giant sea monster, her incredible discovery brings her scientific ambitions tantalisingly within reach.
But as a working-class woman, she is invisible to the geological community to which she longs to belong. After she witnesses a violent crime, and a devastating disaster befalls her, she realises that all around her, monsters lurk.
Against all the advice of those who care for her, with revenge and justice in mind, she steps into a world as cold and dark as the ocean, as treacherous as the storm that is on its way.
