'Tis the season to be jolly and to celebrate Christmas, and decorating the caboose puts Barney and his friends in the holiday spirit. They trim the Christmas tree in the snow-covered park, but something's missing - the shiny, gold star for the treetop! So, it's "over the river and through the woods" to grandmother's attic to search for the missing star. Just imagine all the treasures they discover - little drummer boys and an antique typewriter that's perfect for writing a letter to Santa. The children celebrate with friends and family as Barney places the Christmas star atop the tree!