This short story revolves around a plot to steal some goods secured safely within an impenetrable vault within the confines of Mr. Stoughtons business concern.
Though he cant be sure that the safe contains anything valuable, speculation is rampant among those who know of its existence. This is classic Green, with lots of high drama and a twisting, many-layered plot turning on stubbornly kept secrets and the fine points of physical and circumstantial evidence.