“White Top”, a young and cheerful Triceratops is very close to its father “Red One”, leader of the Triceratops herd. During the leadership battle, “Red One” injured its leg and loses the leadership of the herd. While resting in the forest with “White Top”, they encounter a raging Tyrannosaurus Rex, “Great Scar”. Despite the injured leg “Red One” fight with it’s life to protect “White Top”.