Young Mouse lives a happy, solitary life in a tumbledown barn on a humble, old farm. Sleeping in a wheat hut and eating his meals from a small bowl made from a hollowed chestnut, he takes baths in a horse pail and watches the beautiful wildlife creatures from the safety of his barn window. But while he feels content in his home, he is also lonely.

One day, when he's feeling particularly brave, Mouse ventures out into the countryside in search of friends. But along the way he runs into unexpected slithering and flying dangers that send him racing back to his beloved barn, having...