A severed hand discovered in a trash can initiates a complex investigation for the detectives of the 87th Precinct. Detective Steve Carella and his colleagues must navigate the gritty urban landscape of Isola to identify the victim and track a killer who leaves behind gruesome clues. The narrative follows the standard police procedural framework, focusing on the methodical collection of evidence and the interpersonal dynamics of the precinct staff. The detectives face significant logical constraints, including limited forensic technology and the pressure of a city that rarely cooperates with law enforcement.

Readers and critics frequently highlight the author's ability to maintain a brisk, realistic pace that mirrors the daily grind of police work. Discussion often centers on the technical accuracy of the procedural elements and the authentic, hard-boiled tone of the dialogue. Many observers note that the ensemble cast provides a balanced perspective, allowing for character development that complements the central mystery. The atmosphere is consistently described as gritty and grounded, avoiding sensationalism in favor of a clinical look at urban crime. This work is often cited as a foundational example of the police procedural subgenre, valued for its consistency and structural integrity.