All her life, Mrs. Tillby has lived in a white house by an apple orchard. And all her life Mrs. Tillby has wondered what it would be like to live someplace else. But where?
One day, she climbs into her green Studebaker truck and leaves her apple orchard behind, zooming off to try life with her son Les in the city. The city, with all its hustle and bustle, makes her happy at first, but it just doesn't feel like home. Next she tries staying with her daughter, Tess, at the seashore. A nice place to visit, but Mrs. Tillby doesn't want to live there. So in her trusty truck she first heads for the mountains, then to a cabin by a lake, then to an adobe hut in the desert, and finally, to a riverboat! None of these suit her, for, after a few weeks in each new place, she always wants to move on.
But when Mrs. Tillby finds a shiny silver trailer, to her delight, she realizes she can be both at home - and also someplace else!