A favor for an old friend ignites a high-stakes investigation into a powerful developer's aggressive tactics. Spenser, a seasoned private investigator, is drawn into a conflict when his long-time boxing trainer, Henry Cimoli, faces pressure from a ruthless developer aiming to acquire his Revere Beach condo. Aided by his apprentice, Zebulon Sixkill, Spenser uncovers a complex scheme involving a captivating woman, a powerful Las Vegas casino magnate, and ambitious plans for a new casino on land north of Boston. The investigation exposes corruption within the Boston political machine and leads them to the site of the former Wonderland amusement park, where they must confront the fight of their lives.

The novel is a typical entry in the Spenser series, offering a familiar blend of gritty detective work and fast-paced action. Readers familiar with Ace Atkins' continuation of Robert B. Parker's iconic character will find the expected elements of loyalty, justice, and a complex criminal underworld. The narrative structure, following Spenser and Zebulon as they navigate Boston's underbelly and political landscape, provides a solid framework for the unfolding mystery. The setting of Revere Beach and the former Wonderland site adds a specific, evocative backdrop to the story's climax.