Dimiter opens in the world's most oppressive and isolated totalitarian state: Albania in the 1970s. A prisoner suspected of being an enemy agent is held by state security. An unsettling presence, though subjected to unimaginable torture he maintains an eerie silence. He escapes—-and on the way to freedom, completes a mysterious mission. The prisoner is Dimiter, the American "agent from Hell."

The scene shifts to Jerusalem, focusing on Hadassah Hospital and a cast of engaging, colorful characters: the brooding Christian Arab police detective, Peter Meral; Dr. Moses Mayo, a troubled but humorous neurologist; Samia, an attractive, sharp-tongued nurse; and assorted American and Israeli functionaries and hospital staff. All become enmeshed in a series of baffling, inexplicable deaths, until events explode in a surprising climax.

Told with unrelenting pace, Dimiter's compelling, page-turning narrative is haunted by the search for faith and the truths of the human condition. Dimiter is William Peter Blatty's first full novel since the 1983 publication of Legion.