"Secret Mittens Guide the Mitten Mice Quest," which recounts a fantastical adventure involving three children. Mia receives special knitted mittens from her grandmother that suddenly activate, revealing glowing maps guiding her and her friends, Max and Harper, into the snowy woods behind their elementary school. The map leads them to a hidden underground world populated by Mitten Mice, who wear tiny winter accessories and speak. The Mitten Mice reveal that the special gloves are knitted every generation to help them locate the lost treasures of winter, specifically the magical Great Winter Acorn, which is essential for keeping the forest safe.