1837. London is entering a new age of science and industry. Yet at the centre of the city stalked a vicious ghost by the name of Spring-Heeled Jack. Three investigators — Inspector Lea of the Metropolitan Police, journalist Simeon Effraim and amateur detective Lady Decharles — go in search of this terrible creature. They may not agree on who or what Jack is, but they all know that this malicious spirit must be driven from London.