Prilla just can't say no. When Nettle asks her to join in on caterpillar sheering for the second day in a row, Prilla tells a little white lie—she prefers butterflies to caterpillars. Then all the butterfly-herding talent fairies come down with a case of fairy pox, and because of her 'love of butterflies,' Prilla is asked to help out. But butterfly-herding is a lot harder than it sounds . . .