Secret in the Tree House

Kari McKenzie and her family have sold their home and have moved a thousand miles away, to live on Grandpa Rob's farm with his elderly sister, Lizzy. During the next few weeks, Kari learns things about her family that she had not known, and learns first-hand how keeping secrets from family members can affect the lives of many people, sometimes in unforgivable ways.
While exploring her new surroundings, Kari helps in finding new evidence that may solve a seventy-five-year-old mystery and return a missing baby to its home.