"Patrick" is a butterfly with a problem. One of his wings is a bit stunted so he cannot fly. When it comes to their annual migration, this means that he and best pal "Marty" - an enthusiastic caterpillar yet to mature, must stay behind guarding the milkweed. Meantime, "Jennifer" is to be tasked with pulling their emergency supply of this fodder as they travel and the two to be left behind decide tver mais...