Reverend Alden visits the Ingalls home and offers Mary her very first teaching post. It will be for two months and is located in a backwater community where the local spinster who thinks that any book other than the bible is evil, makes Mary's life as difficult as possible.
The children clearly want to learn but their parents and certainly the spinster are not at all impressed. Mary finally loses her temper when the spinster, holding Sunday service in the absence of a minister, starts shreiking about breaking the commandments. The townsfolk are justifiably terrified and riveted but Mary soon figures out that the woman cannot read and offers to help her learn if she wishes to do so.