The lovable residents of Kikoriki Island are thrown into big adventure when their local scientist invents an amazing device that is meant to allow people to trade abilities, but actually swaps their personalities! When spineless young Wally tries to use the device to cure his cowardice, he ends up accidentally swapping bodies with a caterpillar! Now he's got more to fear than he ever dreamed, and so do his fellow villagers, as they're dragged into a madcap adventure packed with plane crashes, mistaken identities, erupting volcanoes and more!