“A murder will occur tonight at Beecham House . . .” Who could resist such a compelling invitation? Of course, the murder in question purports to be a party game, and Phyllida looks forward to using some of the deductive skills she has acquired thanks to her employer, Mrs. Agatha, who is unable to attend in person.

The hosts, Mr. and Mrs. Wokesley, are new to the area, and Phyllida gladly offers their own overwhelmed housekeeper some guidance while events get underway. Family friends have been enlisted to play the suspects, and Mr. Wokesley excels in his role of dead body. Unfortunately, when the game's solution is about to be unveiled, the participants discover that life has imitated art. Mr. Wokesley really is dead!

In the absence of Inspector Cork, Phyllida takes temporary charge of the investigation, guiding the local constable through interviews with the Murder Game actors. At first, there seems no motive to want Mr. Wokesley dead . . . but then Phyllida begins to connect each of the suspects with the roles they played and the motives assigned to them. It soon becomes clear that everyone had a reason to murder their host—both in the game and in real life. Before long, Phyllida is embroiled in a fiendishly puzzling case, with a killer who refuses to play by the rules . . .