October 3, 1989. Seventy-nine-year-old wealthy Jewish widow Esther Kellerman lives in a small suburb outside of Columbus, Ohio. Esther thinks she has a pretty good life. She plays bridge, reads for her book club, and routinely drives her Cadillac DeVille into the mailboxes of her neighbors. Her latest mailbox mishap leads her to the doorstep of some mysterious new residents of her neighborhood. As she introduces herself to Sarah, the elderly woman who answers the door, Esther soon realizes that there's something wrong with her. Eighty-nine-year-old Muriel Schwartz has also met the new neighbor Sarah, along with Sarah's son David and daughter-in-law Dianne. David and Dianne ask Muriel to look in on Sarah for a couple of hours each day while they're at work, and because Muriel is having financial troubles and needs the money, she agrees to help out. When Esther hears of this plan, she offers to lend a hand. Eighty-five-year-old Rosalie Sherman, Esther's widowed sister-in-law, thinks that both Esther and Muriel have lost their minds and wants no part in what she sees as a ridiculous care-giving arrangement doomed to fail. Rosalie never shies away from saying what she thinks, but Esther is taken aback at Rosalie's emphatic refusal to help out with Sarah. With a touch of humor and a lot of heartfelt warmth, The Enlightenment of Esther paints a vivid portrait of the lives of Esther and her contemporaries, all in their seventies and eighties, and how their relationships intersect and intertwine in ways even Esther couldn't have predicted. But if anyone can solve this mystery of just exactly who Sarah, David, and Dianne are, Esther Kellerman can!