After having her horse shod for the annual race, Laura learns that the Olesons have purchased an expensive racehorse for Nellie.
Laura thinks she saw Mr. Oleson kill his wife, but no one believes her.
Nellie's imminent motherhood causes a rift between the in-laws over the religious upbringing of the child.
Laura and Almanzo make the mistake of agreeing to care for his nephews while their parents are on vacation.
Mary feels like a burden when Adam resumes his education to be a lawyer.