Speed and self-confidence, that's Astrid's motto. Nicknamed "the little thunderbolt," she loves to spend her days racing down the hillside on her skis or sled, singing merrily as she goes, and drinking hot chocolate made from real chocolate bars with her grumpy best friend and godfather, Gunnvald. She just wishes there were other children to share in her hair-raising adventures. But her world is about to be turned upside down, first by the arrival...