In a house on the corner with a big red door, a very nice family of four is preparing for the magic of Christmas. But they aren't the only ones watching the season unfold. Living quietly in the baseboard is Millhouse, a courageous and curious little grey mouse with a perfect view of the world above.

As the house fills with "strange" things like twinkling lights, stockings, and a giant pine tree, Millhouse finds himself filled with questions. Who is this mysterious "Santa Claus" everyone is waiting for? And why does this time of year feel so different?

Determined to find the truth, Millhouse hatches a bold plan: he’ll secure his tiny folding chair high in the branches of the Christmas tree and wait for the jolly old elf himself.

Join Millhouse on a snowy Christmas Eve for a chance encounter that changes everything. From his tiny seat in the tree, Millhouse is about to discover that Christmas isn’t just about presents and reindeer—it’s about a much bigger story of love, hope, and the greatest gift of all.