<p>Mary Russell and her husband, Sherlock Holmes, have stirred the wrath of a murderous secret organization bent on infiltrating the government. Now they are separated and on the run, wanted by the police, and pursued across the Continent by a ruthless enemy with limitless resources and powerful connections.<br><br>Unstoppable together, Russell and Holmes will have to survive this time apart, maintaining contact only by means of coded messages and cryptic notes. But has the couple made a fatal mistake by separating, making themselves easier targets for the shadowy government agents sent to silence them?<br><br>A hermit with a mysterious past and a beautiful young female doctor with a secret, a cruelly scarred flyer and an obsessed man of the cloth: Everyone Russell and Holmes meet could either speed their safe reunion or betray them to their enemies&mdash;in the most complex, shocking, and deeply personal case of their career.</p>