Set in the underbelly of Victorian London's East End, Joe Rat follows the fortunes of a tosher, Joe, who lives by scavenging in the sewers around the area of Whitechapel. It's a fast-paced and vivid tale of survival in a society which fosters neither friendship nor trust. But Joe comes to know both after a chance encounter with a runaway girl, Bess, and the 'madman' who inhabits Pound's Field. With gangs lurking round every corner and a life spent in the rat-infested tunnels below the streets, Joe needs more than a prime piece of tosh to change his fortunes.