In the tropical rainforest of what is now Oxtordshire, England, rules the first dinosaur to ever be known to science, Megalosaurus. For months, the mother has been guarding and taking care of her nest of eggs, waiting for the day they'd hatch. One night, her young are born, but as they are the forest is set ablaze by wildfire. Now it is up to the mother to guide her newborns out of the intense blaze, even as they are still hatching.