When Sir Simon Chandos is found poisoned in his library, with a confession in front of him and a phial of morphia tablets on the table at his side, suicide is the obvious deduction. This is a dreadful shock to the members of the house party gathered in his picturesque old Norman country house, Freyne Abbey. But the discovery of a trivial discrepancy, by one of the guests, turns the suspicion in the direction of murder, and from that slight clue the amateur detective, Scott Egerton, unravels the web of an exceptionally brilliant and cold-blooded plot…