Meet the Littles, a family like any other but with a few tiny differences! They live in the walls of the Bigg family house where they get everything they need. In return they make sure the Bigg house is always in good repair. Lucy and Tom Little are bored. And when Lucy starts getting into trouble, the Littles realize they have to do something to keep the kids entertained. A gathering of tiny families is planned and the Littles set out for the meeting right away. But they will have to travel far and danger awaits them on their trip. The Littles are in for one big adventure!