When LAPD Detective Peter Decker investigates the death of an eccentric recluse, he uncovers a complex web of secrets that challenges his understanding of the victim's true character. Decker must navigate the conflicting testimonies of the deceased's estranged children, his second wife, and local associates to determine if Hobart Penny was a victim or a predator himself. The narrative follows a traditional police procedural framework, focusing on the methodical collection of evidence and the interrogation of suspects who each hold a piece of the puzzle. As the investigation deepens, Decker faces the physical and psychological toll of uncovering a history of depravity hidden behind a facade of genius.

This installment in the long-running series maintains the established tone of the Decker and Lazarus procedural novels. The narrative relies on the familiar dynamic between the two protagonists as they navigate the complexities of a multi-faceted criminal case. Readers familiar with the series likely appreciate the focus on character development alongside the central mystery. The plot structure suggests a methodical approach to uncovering hidden histories, which is a hallmark of the author's style in this genre.