Natasha Blake is a detective with a difference. She's an ancestor detective, an ambitious young genealogist with a passion for history, whose choice of career is partly driven by the mystery of her own roots. The disappearance of a young girl, Bethany, appears to be linked in some way to Lizzie Siddall, the haunting ethereal Pre-Raphaelite model and artist, whose life was cut short by an overdose of laudanum.