1780 Thornleigh Hall, seat of the Earl of Sussex, dominates its surroundings. Its heir is missing, and the once vigorous family is reduced to a cripple, his whore and his alcoholic second son, but its power endures.

Impulsive Harriet Westerman has felt the Hall’s menace long before she happens upon a dead man bearing the Thornleigh arms. The grim discovery cries out for justice, and she persuades reclusive anatomist Gabriel Crowther to her cause, much against his better judgement; he knows a dark path lies before those who stray from society’s expectations. That same day, Alexander Adams is killed in a London music shop, leaving his young children orphaned. His death will lead back to Sussex, and an explosive secret that has already destroyed one family and threatens many others.