"Among these unfinished tales is that of Mr. James Phillimore, who, stepping back into his own house to get his umbrella, was never more seen in this world..." — The Problem of Thor Bridge Ten years ago, James Phillimore vanished without a trace. Now his dying sister begs Sherlock Holmes to uncover the truth before her time runs out. As the clock ticks down, Holmes must race to solve one of his most haunting mysteries... And this time, the great detective finds himself guided as much by the heart as by the head…