The pilot film depicts life during the late Jurassic period in England, when it was divided into a set of small islands due to an increase in sea level. A small flock of pterosaurs fly over the British coastline before descending to feeding. Meanwhile, on land, a female Eustreptospondylus is prowling through the dense vegetation before coming upon a large herd of Cetiosaurus, browsing on the tree tops. In the waters, a Liopleurodon is hovering near the surface of the water. However, later the animal is washed ashore and stranded on a beach.