In this humorous reverse Mary Poppin's story, Alice Smith is in a bind or she never would have answered such a peculiar ad for a nanny. As the only candidate for the job, she ends up taking care of the O's--four children whose outlook on life is considerably different from her own. As the five of them work together to thwart Aunt Ethel's plans and figure out who threw a brick with a threatening note tied to it through the window, Alice and the children learn some valuable lessons.