In this tense and atmospheric tale, an English traveler in Russia is unexpectedly swept into the dangerous underground world of the Nihilists—radical revolutionaries hunted by the police. After being mistaken with an English agent of the group, he struggles to maintain his disguise among the conspiracies. Arthur Conan Doyle shows an incredible talent creating such an intense and mysterious tension that can produce chills in the spine of all the readers of his great work.