Czechoslovakia, 1935: Viktor Kosárek, a newly trained psychiatrist who studied under Carl Jung, arrives at the infamous Hrad Orlu Asylum for the Criminally Insane. The facility is located in a medieval mountaintop castle surrounded by forests, on a site that is well known for concealing dark secrets going back many centuries. The asylum houses six inmates - the country's most treacherous killers - known to the terrified public as the Devil's Six. Viktor intends to use a new medical technique to prove that these patients share a common archetype of evil, a phenomenon he calls The Devil Aspect.

Haller is a Lincoln Lawyer, a criminal defense pro who operates out of the backseat of his Lincoln Town Car, to defend clients at the bottom of the legal food chain. It's no wonder that he is despised by cops, prosecutors, and even some of his own clients. But an investigator is murdered for getting too close to the truth and Haller quickly discovers that his search for innocence has taken him face to face with a kind of evil as pure as a flame.

1927: Mary Rourke—a Hollywood studio fixer—is called urgently to the palatial home of Norma Carlton, one of the most recognizable stars in American silent film. Norma has been working on the secret film everyone is openly talking about…a terrifying horror picture called The Devil’s Playground that is rumored to have unleashed a curse on everyone involved in the production. Mary finds Norma’s cold, dead body, and she wonders for just a moment if these dark rumors could be true.

Victorian Edinburgh. Captain Edward Henry Hyde is chief detective for the City of Edinburgh Police; as such, he is responsible for investigating all murders and serious crimes in the city. Hyde is a striking but severe-looking man who provokes unease, and often fear, in those who encounter him. Nevertheless, Edward Hyde is truly a good man...though he wrestles fiercely with his own unique demons.

Berlin, 1963. An early morning spy swap, not at the familiar setting for such exchanges, nor at Checkpoint Charlie, where international visitors cross into the East, but at a more discreet border crossing, usually reserved for East German VIPs. The Communists are trading two American students caught helping people to escape over the wall and an aging MI6 operative. On the other side of the trade: Martin Keller, a physicist who once made headlines, but who then disappeared into the English prison system.