Documentary exploring the lesser-known side of Arthur Conan Doyle, who solved real crimes as chilling and baffling as those investigated by his creation Sherlock Holmes. His two most infamous cases involved tracking down a madman who mutilated horses and brought terror to a quiet, leafy English village, and the brutal murder of a wealthy spinster which led Doyle to expose corruption at the heart of Britain's justice system. Driven by a deep sense of justice, Conan Doyle strove to prove the innocence of two wrongfully convicted men, so confirming the belief in minds of many that Sherlock Holmes and Conan Doyle were one and the same.