A chance encounter with old enemies leads Littlefoot and friends to discover a phenomena they can barely comprehend. The answers to that phenomena shall lead to tough choices that will drive them to their very breaking point.

Even in the land of dinosaurs, nothing stays the same. Littlefoot and his friends start to feel the effects of 'The Time of the Great Change'. As they struggle to cope with the signs of coming adulthood, certain feelings start to come to the surface, some that break the laws of nature itself. And the Great Valley will never quite be the same. T rating for adult themes.

Ducky and Petrie have had special feelings for each other for a little over a year since they came to the Great Valley, but only now they have begun to realize they are falling in love with each other. However, with interspecies relationships being discouraged in the Great Valley, the two hatchlings feel hesitant about building their relationship unless they can do it in secret.