A series of seemingly unrelated murders involving elderly women forces detective Ellery Queen to confront a killer who uses nursery rhymes as a blueprint for crime. Ellery Queen investigates a string of homicides where the victims are all older women, each death mirroring a line from a familiar nursery rhyme. The protagonist must navigate the psychological profile of a perpetrator who operates with methodical precision, leaving behind cryptic clues that challenge traditional investigative logic. The narrative employs a third-person perspective, focusing on the analytical deduction required to dismantle the killer's elaborate scheme. The world is defined by the rigid social structures of the mid-twentieth century, where the detective must balance public scrutiny with the pressure to prevent further casualties.

Readers frequently highlight the intricate puzzle-solving elements that define this entry in the Ellery Queen canon. Discussion often centers on the effectiveness of the nursery rhyme motif as a narrative device to heighten the tension of the investigation. Critics note the clinical precision of the prose, which prioritizes logical deduction over emotional exposition. The pacing is described as deliberate, allowing for a methodical examination of clues that keeps the reader engaged until the final reveal. Many appreciate how the author maintains a consistent atmosphere of suspense while adhering to the conventions of the classic detective genre.