Dick has travelled to London to seek his fortune, but upon arrival, things are not quite as he imagined. The city is overrun with rats and Alderman Fitzwarren is at his wits' end trying to banish them.
Sensing an opportunity to prove himself, and to win the heart of Alice Fitzwarren, Dick vows to rid London of its vermin problem. But King Rat frames Dick in a cunning bid to maintain control of the streets, and with Sarah the Cook, the lazy yet lovable Idle Jack, and Eileen the Cat by his side, Dick must work harder than ever to clear his name, restore order, and claim his destiny.