Set in an unspecified future, the film follows the journey of Captain Lee and his crew after they crash land on a planet with similar life conditions as Earth, but millions of years behind in time. Encountering a wide variety of dangerous dinosaurs, the crew decides that its best chance for survival lies on finding higher ground and setting up a defensive perimeter on a higher plateau for refuge to wait for when (or if) their rescuers arrive. They soon encounter a deadly tyrannosaurus and must figure out a way to defeat the creature and survive on the planet.

References:
https://en.wikipedia.org/wiki/Planet_of_Dinosaurs