Each of the six members, including their president, Berkeley's amateur sleuth Roger Sheringham, arrives at an altogether different solution as to the motive and the identity of the perpetrator, and also applies different methods of detection (basically deductive or inductive or a combination of both).

Completely devoid of brutality but containing a lot of subtle, tongue-in-cheek humour instead, The Poisoned Chocolates Case is one of the classic whodunnits of the Golden Age of Detective Fiction.

After arriving at his London club at 10:30 am precisely, which he has been doing every morning for many years, Sir Eustace Pennefather, a known womanizer whose divorce from his current wife is pending, receives a complimentary box of chocolates through the post.

However, at a loss as to the further details of the crime, Scotland Yard conclude that the sender must have been some maniac or a fanatic trying to rid society of one of its most immoral members.

Worthy pillars of society including a barrister, a writer of detective novels, and a female author, the members of Roger Sheringham's Crimes Circle go about individually solving the case.