Aunt Kate, one of the "right kind," is lonesome in her new house without any young people, and borrows Sonny Boy for six months. The lad has a happy visit and many pleasant experiences, learning the while some helpful lessons. Delightedly one reads of Otto and the white mice; Lena and the parrot, the wild man of the circus, and Sonny Boy's ambition to command the Poppleton Guards, but Miss Swett tells the story, and when that is said, nothing remains but to enjoy the book.