Jill and Joy (both 9) live inside their house in the same way as any other little girls, except they may be considered a bit more difficult than most young girls, as they get to stay inside their house specifically created for the 2. One December evening a small car the size of a shoebox, pulls up in front their home, and also a family that is teensy-weensy gets outside. Oahu is the McTiny family. The household is now displaced following a road roller smashed their dwelling. Planning to live with the girls temporarily, the family goes with Jill and Joy but soon realizes that maybe not all of big folks have good intentions . Jill and Joy's cold temperatures is centered on a beloved book by the same name, written by a Finnish writer.