Topher''s amazing cat, Ka, has time-travelled again and left him yet another mysterious clue. Following his nose, Topher finds himself in Victorian London where disease is rife and the Thames is clogged with stinking sewage! <br>There he discovers a plot to kill Joseph Bazalgette, the man who is trying to save the city. Determined to foil this foul plan, Topher must first escape from an arch-criminal and his den of thieves. <p>A thrilling historical fantasy which explores the intriguing hidden details of times past.</p>