Painter and Ugly are best friends. They run together, they swim together, they eat out of the same dinner bowls. When one calls out, "Yip," the other answers back. They are inseparable! That is, until they are forced apart and put on two different teams for the junior Iditarod. But nothing can keep them apart. When during the race Painter finds a boy musher alone, stranded on the trail, he calls out, "Yip!" and Ugly answers his call. These old friends team up to finish the race, together again, side by side.