Kit Chatterton is happy to spend his life on the Fens with his uncle making a study of local birdlife, though he seems to have his own ideas as to which birds interest him most. Then his uncle has a letter from the man who was once his boss. His daughter has committed suicide after messing with the occult and he wants someone to investigate her death. From that moment things change. Kit and his uncle are catapulted into a life of mystery and murder. Nothing will ever be the same again.