The movie starts in springtime, about a year after Charlotte has died. Charlotte's three daughters, Nellie, Aranea, and Joy, are now teenagers, with Wilbur taking care of them. During this time, Wilbur becomes friends with a newborn lamb named Cardigan, who is rejected by the other lambs and the younger sheep of his flock because he has black wool. Wilbur takes Cardigan under his wing and shows him the farm, the ways of animal life, and dangers to look out for. However, after only a few weeks, farmer Zuckerman suddenly sells Cardigan to another farmer, so Wilbur, along with Charlotte's daughters and Templeton the Rat, set out to visit Cardigan and make sure he is okay.