"I’d like to have a large house and a splendiferous garden . . . I mean to do something grand. I don’t know what, yet; but when I’m grown up I shall find out."

Katy Carr is mischievous, untidy, and unruly. Free to run wild around the countryside in which she has grown up, life for Katy is good—much to the continual dismay of her Aunt Izzie who is endlessly mending Katy's broken clothes and tidying up her mess. But Katy has grand plans for her future, and can’t wait to grow up and fulfill her dreams. However, disaster strikes when Katy has a terrible accident which changes everything. Will Katy learn to control her temper and be as good and kind as she had always dreamed of being?