Set during the New Zealand Gold Rush of the 19th century, this novel follows Walter Moody, a prospector who stumbles upon a secret meeting of twelve local men who are trying to solve a series of unsolved crimes. As the story unfolds, it becomes clear that the crimes, which include a rich man's disappearance, a prostitute's attempted suicide, and a huge fortune found in a drunkard's cottage, are all interconnected. The novel's complex narrative structure, which uses astrology to organize its characters and events, adds another layer of intrigue to the story.