Even the lovably simple residents of peaceful Kikoriki Island are thrown kicking and screaming in to big experience, if their resident scientist invents an awesome apparatus - a helmet known as"the Improverizor," which takes personality characteristics in one person and swaps them with traits of somebody else. But if spineless young Wally attempts to use the device to cure his cowardice, he eventually ends up spineless - by becoming unintentionally body-switched with a little caterpillar. He has more to fear when he would have imagined, and so do his fellow villagers, as they're hauled to a madcap adventure packed with angry primitives identities , erupting volcanoes and plane crashes on the warpath. Boy, do the Kikoriki Crew wish they could switch place now - .