The story follows a little white dog as he wanders a mysterious forest. We see his old jumper snag on a branch, and watch it gradually unravel to leave him shivering in the cold. At that moment, a door set in the hollow of a tree marked with the number 79, magically opens... a little wink to the Mungo & Maud store at 79 Elizabeth Street, London. Inside, an elderly cat is knitting a Highland Pullover, a soft & cosy merino wool turtleneck, with a small pocket to hold a little treasure or two. The generous cat donates her creation to the shivering little dog. The little dog now joyfully continues his journey in warm comfort and finally comes to celebrate Christmas with his Mungo & Maud friends.

The film is complemented by a virtual fairy tale book, containing excerpts of additional tales and curated gift ideas.