In years since the events of 2009 (Land Of The Lost), Dr. Rick Marshall & Holly have now been married for 14 years. Will Stanton & Chaka have become the Lords of the Lost. Dr. Rick Marshall & Holly Marshall have now since then adopted and raised a Sleestak youngster as one of their own and named her "Clementine Pion Marshall". But then a portal that leads to the jungles & forests of the Land Of The Lost opens up in front of the Marshall family's home. And out of that portal steps Grumpy The T-Rex with his new Tyrannosaur mate, Scar Face, and out of the portal steps two Spinosaurs, two Raptors, and Will & Chaka as well. They all have come to warn the Marshalls that Enik has suddenly found a way to enter into our world and invade it. So it is on once again to stop Enik from invading Earth. But this time the Land of the Lost that they knew from 2009 has changed a lot since they both left.
