A tangled mystery/adventure with an unusual if unwieldy central gimmick -- the current surfacing of a medieval religious heretical brotherhood (akin to the Rosicrucians). Harley, a script writer, and Mulloy, vagabond factotum, investigate -- for a film in the making -- a writer/underground soldier Graham, an American mysteriously killed in Paris during World War II. En route they come in contact with ""the Heresy,"" an anti-clerical society rooted in the Albigensian movement of the 12th and 13th centuries. In its 20th-century guise the Heresy infiltrated both Communists and Fascists in Paris. While unknown instigators attempt to destroy the film and one actor is murdered, Harley and Mulloy interview, chase, are chased, and find themselves in a maze of double identities, a stalemate of conflicting statements and more deaths. The unraveling and reraveling is not helped by lapses into a curious idiom (""How's for a bit of scarf?. My tummy's anguished""). Mostly it's a bit of a chore.