Stunning photo-realistic computer-generated animation transports audiences back to the Late Cretaceous, when a great inland ocean divided North America in two. The film will follow a curious and adventurous dolichorynchops (familiarly known as a 'dolly') as she travels through life's stages, experiencing the world from her spot near the bottom of the food chain. Along the way, she'll encounter long-necked pleisosaurs, giant turtles, enormous fish, ferocious flippered crocs, fierce sharks, and the most dangerous sea monsters of all, the mosasaurs.