The discovery of the murdered President of St Anthony's College within his locked lodgings initiates a high-stakes investigation into the insular world of academia. Inspector John Appleby must navigate the complex social hierarchies and intellectual rivalries of the college fellows to identify the culprit. Because the crime scene is physically isolated by a locked gate, the pool of suspects is restricted to a small group of academics, each possessing both a motive and the means to commit the act. The narrative follows a traditional investigative framework, focusing on the logical deduction of clues within a confined setting.

Readers frequently highlight the clever construction of the locked-room puzzle and the author's ability to infuse the narrative with dry, academic humor. Discussion often centers on the intricate social dynamics of the college fellows, which serve as both a distraction and a key to the mystery. Critics often note the sophisticated vocabulary and the intellectual rigor Appleby applies to his investigation. The pacing is generally described as deliberate, favoring character study and atmospheric detail over rapid-fire action sequences. Many enthusiasts of classic detective fiction appreciate the balance between the formal constraints of the crime and the nuanced personalities of the suspects.