 The Sloane sleuths are joined by female Scotland Yard inspector Churchill when a murder is committed by Grant Connors, an expert art thief and seducer she follows everywhere. Yet she has a deal with him to reunite a set of diamonds last owned by the last Romanov czar. When Mark confronts her being a phony, she tells to be one of his victims, Vanessa Sellars, whose husband died from heart-failure when surprising them. Meanwhile Jesse decides to donate to the same auction, for the benefit of the hospital, a possibly priceless violin his father gave him. The auction proves eventful...