During summer vacation, Ellen and Austine decide to dress as twins on their first day back to school. The plan is for their mothers to make identical dresses for them. Austine's mother, however, cannot sew, so her dress doesn't turn out well. As the day goes on Austine begins to amuse herself by tugging on the sash of Ellen's dress. Ellen gets irritated and finally slaps Austine in the lunch line when her sash comes undone. Unfortunately, Austine was innocent; Otis had pulled on her dress. Austine begins spending time with other girls and ignores Ellen, who thinks everyone looks down on her for slapping her best friend.