Topher`s amazing cat, Ka, has time-travelled again & left him yet another mysterious clue. Following his nose, Topher finds himself in Victorian London where disease is rife & the Thames is clogged with stinking sewage! 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 & his den of thieves. A thrilling historical fantasy which explores the intriguing hidden details of times past.