The sudden, simultaneous deaths of a husband and wife at their estate trigger a complex investigation into potential foul play. Sir John Appleby and his wife, Judith, find themselves amidst a gathering of guests at Charne, where the host's erratic behavior and a dying woman's unusual request for her husband to remarry her niece create immediate tension. The narrative follows Appleby as he navigates the social intricacies of the estate to uncover the truth behind the suspicious circumstances. The story is presented through a traditional third-person perspective, emphasizing the logical deduction required to untangle the web of motives surrounding the deaths.

Readers frequently highlight the author's ability to blend traditional mystery elements with a sophisticated, academic tone. Discussion often centers on the intricate plotting and the sharp, observant nature of the protagonist, Sir John Appleby. Critics often note the balance between the formal social setting and the underlying tension that drives the investigation forward. The work is recognized for its adherence to the conventions of the golden age of detective fiction while maintaining a distinct, literate style. Many readers appreciate the focus on character psychology and the methodical approach to solving the central crime.