The Lost City

When a young girl’s sketchbook falls into a strange pond, her drawings come to life—chaotic, real, and on the loose. As the town descends into chaos, her family must reunite and stop the monsters they never meant to unleash.

Legends claim that Saurus Rock keeps bad luck out of the Great Valley. Is it really true? Could the mysterious Longneck named Doc be the famous Lone Dinosaur, who can defeat a Sharptooth with his lasso-like tail To find out, Littlefoot and company must cross the great Valley and face a dangerous Sharptooth themselves!

Littlefoot learns a series of important lessons following an incident that nearly costs his grandmother her life. Soon afterwards, three dinosaurs arrive claiming they have lost their way.

When the dinosaur families get trapped in a valley by an ice storm, one family of "spike tail" dinosaurs volunteers to leave since they consume more food than the others. Meanwhile, the young dinos and a new adult dinosaur named Mr. Thicknose, head out to bring back their friend Spike, who has left his friends to be with members of his own species.