Petrie is having a difficult time preparing for "the day of the flyers" a very important day for all the flying residents of the Great Valley. The young flyers must participate in a very precise flying exhibition to prove they are ready to fly with the adults. Always nervous when flying, Petrie has even more trouble flying with his siblings in precise group formations. At the same time, a newcomer has Littlefoot and his friends trying to help him figure out just exactly what he is. Cera is having her own troubles, as her grumpy dad and his new mate, Tria, get ready to welcome a hatchling to the family.