When George March, a womanizing aristocrat, is found dead over his morning coffee, his wife Emily is accused of murder. But Emily's sister is none other than the indomitable Charlotte Pitt. Together, she and her husband, Inspector Thomas Pitt, take on the seemingly irreproachable March clan — and uncover an insidious web of corruption and depravity that leads them from the elegant Crescent town house to the hideous London slumbs, from genteel society to murder — again.