Several people in Walnut Grove get very sick. A quarantine is set up in the church while the source of the illness is being sought.

As a prank to make him look foolish, the older boys of Walnut Grove school nominate the object of their practical jokes, gentle Elmer Dobkins, to run for class president against popular Mary Ingalls and wealthy Nellie Oleson. While Mary and Nellie wage their campaigns with promises of popcorn and gum balls, Mr. Dobkins witnesses his son being teased by the older boys and, when he finds out why Elmer was nominated, angrily orders him to pull out of the election. But, when election day comes and the race seems too close to call, a cruel act and children tired of being bullied decide the outcome.

Adam wins a prestigious award. Laura and Albert give the Christmas money they had made from collecting honey, to Adam and Mary to go on a trip to receive the award. The stagecoach is involved in a very serious accident.

Laura goes to visit Eliza Jane because of a literature seminar that is going on in town. Laura has to find a part-time job to pay for meals and other stuff. She ends up hating the job. There is a person who Laura met on the train who begins to like Eliza Jane. Eliza Jane in turn begins to like the professor teaching the seminar and the professor likes Laura. The professor tells Laura that her writing is bad when Laura tells him she is happily married. The man on the train eventually defends Laura's writing. It only takes one punch by the man to get the professor to take off and leave.