Lindy Carmichael isn't feeling particularly joyful when she returns home to Wenatchee, Washington, for Christmas. The man she thought was 'the one' has cheated on her with her best friend and she feels completely devoid of creativity in her graphic-design job. Not even carollers or Christmas cookies can cheer her up - but Lindy's mother, Ellen, remembers an old tradition that might lift her daughter's spirits. Reading through a box of childhood letters...