 Arthur's new friends intend to help him return to his grandfather, but quickly discover that all of the entrances to the tunnels have been sealed.At the shop, a mysterious individual sells Willbury a number of miniaturised creatures and attempts (unsuccessfully) to buy their full-sized counterparts.Later, during a shopping trip, Willbury and Arthur are surprised to find that miniaturised Underlings are sold to Ratbridge's women as the latest fashion trend.