Dellarobbia Turnbow has a good life. She and her husband have to scrimp a little to pay their bills and feed their two kids, but her husband is a good man. A little unimaginative and too subordinate to his mother to suit Dellarobbia, but a good man. Then her life is turned upside-down by an invasion of monarch butterflies. Her church thinks it’s a miracle. Her in-laws think it’s nuisance, interfering with their decision to sell the trees for the price of lumber. To Dellarobbia it’s an invitation to a new world.