Arthur has fallen foul of the appalling Snatcher and is trapped alone in the town, with no way home Meanwhile Snatcher and his men are working tirelessly in secret on a fiendish and dastardly plan to take over Ratbridge - and the world With the help of Willbury Nibble QC, some friendly boxtrolls and cabbage-heads, Marjorie the frustrated inventor, and the rats and pirates from the Ratbridge Nautical Laundry, can Arthur thwart Snatcher's evil plans - and find his way home?