Nancy Drew investigates a series of threatening anonymous notes sent to the proprietors of a local dancing school. Nancy must navigate the social dynamics of the school while identifying the source of the intimidation before the threats escalate into physical harm. She relies on her observational skills and the assistance of her close friends to uncover the culprit's identity. The narrative follows a linear, third-person perspective that emphasizes logical deduction and the methodical gathering of clues within a suburban setting.

This title remains a staple of the long-running series, reflecting the established formula that defines the Nancy Drew canon. The narrative structure prioritizes clear, accessible mystery-solving that appeals to younger readers interested in detective fiction. Readers often note the consistent characterization of Nancy as an independent and resourceful lead who navigates various social environments with ease. The book serves as a representative example of mid-century juvenile mystery writing, maintaining a focus on plot-driven suspense rather than complex psychological exploration.