Be careful what you wish for! Luke and Austin Brockway can't seem to stop arguing. Luke says he'd rather have a grizzly bear for a brother. Austin claims a Komodo dragon would smell better than Luke. While they are on a school trip to the zoo, a violent storm creates chaos in the atmosphere and their wishes are granted! Luke turns into a Komodo dragon and Austin becomes a grizzly bear. Luke can't eat the frozen rats he gets for supper, and Austin is scared of his seven-hundred pound roommates. A mean guard with a temper and a cattle prod adds to their misery. Gramps tells the boys they are victims of an old family curse that can't be undone until the next violent storm. Until then, they must help each other survive as zoo animals. Will they ever return to their normal, happy lives again?