When a spirited eight-year-old lands the part of Innkeeper in the school nativity play, she battles her perfectionist teacher who insists that she "stick to the script" and refuse Mary and Joseph a room.

Dug, along with his sidekick Hognob, unite a cavemen tribe to save their hidden valley from being spoiled and, all together as a team, to face the menace of a mysterious and mighty enemy, on the turf of an ancient and sacred sport.