The episode opens with a confused man wittering, then falling from a top of a building.
It then goes forward a year later, to a writer's crime weekend organised by Lady Violet. The best new crime novel will win the Quill of Osric award. Named after the writer Osric Wolf who died a year earlier,. His death deemed a suicide.
Vying for the award are Jack Wilmot, the weak willed son of a snobbish obnoxious writer and politician Sir Kingsley Wilmot. Then there is Walter Mitford, working class, a chip on his shoulder and championed by Lady Violet herself.
Father Brown later finds Jack injured. Then a literary agent Miss Lipton is also found unconscious.
Walter is arrested for the crimes. Father Brown believes that the attacker is out there.
It is all to do with a stolen manuscript and the events leading to the death of Osric Wolf.
I liked this story. An expanded cast helps as the culprit was not too obvious. Good use of red herrings and the motive.