Nym is one of Santa's elves, and has always wanted to fly. One wintry evening, she and a young reindeer named Velvet set out on a wild and wondrous sleigh ride adventure... Giddy-up, let's go! ...but steering a sleigh isn't as easy as it looks. Lost in the swirling snow, Nym and Velvet follow the sonorous sounds of a symphony, filling the night sky. If only Santa was there to help! Determined to get home again, Nym meets musical new friends, learns magnificent new melodies, and discovers the powerful magic of music along the way.