Sherlock Holmes returns to London to resume his practice after a three-year absence, forcing Dr. John Watson to reconcile the shock of his friend's survival with the immediate demands of new criminal investigations. Holmes must navigate the social and professional consequences of his faked death while applying his deductive methodology to a series of complex cases. Opposed by various criminals and the limitations of Victorian-era forensic science, he relies on his observational prowess and Watson's documentation to restore order. The narrative framework consists of a collection of short stories presented as case files recorded by Watson, maintaining the established dynamic between the two protagonists.

Readers and critics frequently highlight the significance of this collection in restoring the iconic partnership between Holmes and Watson after the events of the previous volume. Discussion often centers on the evolution of Holmes's character as he transitions from a more detached figure to one who acknowledges the necessity of his companion. The pacing is noted for its consistency, with each story providing a self-contained puzzle that showcases the author's mastery of the short-form mystery. Scholars often point to the Oxford edition's scholarly apparatus as a primary reason for its value, as it provides historical context that enriches the reading experience for modern audiences.