Hans Christian Andersen's tale "Thumbelina" comes to life in this animated film about a little girl who experiences big adventures. When a magician gives a tiny child named Thumbelina to the kindly widow Hobbs as a special birthday present, Percival the Pig gets jealous and asks a bullfrog to kidnap the wee girl. Thumbelina is whisked off on an adventure through the swamp, where she makes new friends who help her find her way back home.