Yellowstone's Child

Yellowstone's Child's main theme is personal identity, how one answers the question, "Who am I?" The story begins when a married couple, Sam and Gloria Graham, chicken farmers from Mississippi, lose their 10-year-old daughter, Sally, to brain cancer. After her death, they plan to sell their Mississippi farm and move to Nebraska. Before selling, to help recover from their daughter Sally's death, they take a short vacation in February at Yellowstone National Park in Wyoming. At the same time, at Yellowstone, three cousins from the Johanson family reunion fall into a river partially fed by hot springs. Two get right out, but the third, Sarah, hits her head and floats away downstream on her back. The Grahams rescue her from the river and discover she has complete amnesia, so they kidnap her and take her back to Mississippi to replace their dead daughter, Sally. Sarah is eventually declared dead by the local coroner.
After returning to Mississippi with the new Sally (Sarah Johanson), the Grahams inherit significant wealth, move to Nebraska, change their identities, and move again to Ventura, CA, as Sam, Gloria, and Sally Johnson. Sarah, now Sally, still with complete amnesia, enters an all-girls private school that specializes in preparing girls for careers in movies and TV. She starts in 6th grade at Ventura Private School for Girls. After graduating from VPSG, she earns a BA in Music, Theater, and Dance from Cal State. Two years later, about to finish her Masters, she has an auto accident and bumps her head. Her memory of her life before she was ten returns, and she realizes she is not who she thought she was. The question: "Who am I?" sets her on a mission to find an answer.
She confronts her "parents"; they admit to kidnapping her, and she continues to search for her real identity. She asks, "Who am I? Sarah, Sally, or Elaine. Johanson, Graham, Johnson, or Detective Scott." She concludes, NO, I'm really Yellowstone's Child.