While gathering food to bring to his grandfather, young Arthur becomes trapped in the city of Ratbridge, where he and some new friends try to stop a plot to shrink the monsters of Arthur's home, the Underworld, for a nefarious purpose. Welcome to Ratbridge. But beware -- for there is skulduggery afoot. Young Arthur has fallen foul of the appalling outlaw, Snatcher, and is trapped alone in the town with every way home sealed. Meanwhile Snatcher and...