Once planted, a tiny girl, Thumbelina (Tommelise), emerges from its flower. One night, Thumbelina, asleep in her walnut-shell cradle, is carried off by a toad who wants her as a bride for her son. With the help of friendly fish and a butterfly, Thumbelina escapes the toad and her son, and drifts on a lily pad until captured by a stag beetle who later discards her when his friends reject her company.