"In 1893, young journalist Arthur Shaw is at work ... when the Great Storm hits London, wreaking unprecedented damage. In its aftermath, Arthur's newspaper closes, owing him money, and all his debts come due at once ... At one of [his fiancée Josephine's occult society] meetings, Arthur is given a job lead for what seems to be accounting work, but at a salary many times what any clerk could expect. The work is long and peculiar, as the workers spend all day performing unnerving calculations that make them hallucinate or even go mad, but the money is compelling. Things are beginning to look up when the perils of dabbling in the esoteric suddenly come to a head: a war breaks out between competing magical societies"--Dust jacket flap.