At the close of the year 1918, forced to flee England's green and pleasant land, Russell and Holmes enter British- occupied Palestine under the auspices of Holmes' enigmatic brother, Mycroft. "Gentlemen, we are at your service." Thus Holmes greets the two travel-grimed Arab figures who receive them in the orange groves fringing the Holy Land. Whatever role could the volatile Ali and the taciturn Mahmoud play in Mycroft's design for this land the British so recently wrested from the Turks? A recent rash of murders seems unrelated to the growing tensions between Jew, Moslem, and Christian, yet Holmes is adamant that he must reconstruct the most recent one in the desert gully where it occurred. His singular findings will lead him and Russell through labyrinthine bazaars, verminous inns, cliff-hung monasteries - and into mortal danger.