Under the hot sun, the Jeddah streets resemble a scene from an old black-and-white movie: the women dressed like long, dark shadows and the men in their light cotton tunics.
Since former US Marine Jack Morgan started Private, it has become the world's most effective investigation firm - sought out by the famous and the powerful to discreetly handle their most intimate problems.
One late spring evening in 1912, in the kitchens at Sterne, preparations begin for an elegant supper party in honour of Emerald Torrington's twentieth birthday.