Mr. Isaiah Edwards had been portrayed in the show as having a problem with alcohol. When he married Grace Snider, it seemed as though he had turned himself around, and they adopted children. However, after their adopted son was murdered, Mr. Edwards began drinking again.
Eventually, Grace decides to leave Isaiah, and taking their adopted children with her. But do they get back together?
Later in the season, Grace becomes involved with someone else, Nathan Sims, and files for divorce papers. She marries Nathan, and she does not return to Isaiah or Walnut Grove after her new marriage.
Interestingly, Nathan is the brother of Adam Simms, who married Eva Beadle, the Walnut Grove schoolteacher.