Mary Russell, wife of Sherlock Holmes, investigates the murder of their archeologist friend, Dorothy Ruskin, who had given them an inlaid box with a tattered roll of papyrus inside, supposedly written by Mary Magdalene.
Mary Russell and her husband Sherlock Holmes safeguard a letter for an amateur archeologist, but when the archeologist dies in a mysterious accident, they soon find themselves on the trail of a clever murderer.
Mary Russell, wife of Sherlock Holmes, investigates the murder of their archeologist friend, Dorothy Ruskin, who had given them an inlaid box with a tattered roll of papyrus inside, supposedly written by Mary Magdalene.
