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 A thrilling historical...
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.