As Randall and friends prepare for Christmas, Maggie decides to expand the annual Sing-Along into a full-blown Christmas Eve pageant spectacular! Randall introduces everyone to the season of Advent, and Doug discovers something mysterious going on when chocolate chips go missing. Neighbor Scott Hamilton announces he's building a huge 12 Days of Christmas display, and Maggie finds herself called on to sacrifice more and more of her pageant dreams to help her friends. With so much activity and a dizzying carousel of friends stopping by, will Christmas end in disappointment or will the Workshop bunch embrace the invitation of the season and experience the true meaning of Christmas?