Rebecca, her friends, and her father, William, accompany Margie Johnson to her home in Minnesota. They had been asked to help her sort, pack, and move back to Fremont to live with her sister, Annie Owens, Rebecca's neighbor. During the flight to Denver, Margie invites Rebecca to search for hidden compartments in an antique secretary her husband Ben had purchased shortly before his death.Upon arrival at Margie's home, the group is quickly engaged in...