Littlefoot, a brontosaurus child, must fend for himself when his mother is killed (shades of Bambi). With several other orphaned dinosaurs, Littlefoot seeks out the fabled Great Valley, where food and shelter is plentiful. Along the way, the kiddie Dinos learn several vital (and politically correct) life lessons, all the while keeping themselves scarce whenever the fierce tyrannosaurus galumph into view.