On the Jurassic Coast of England, a remarkable 200-million-year-old fossil is discovered - the bones of an Ichthyosaur, a giant sea dragon. David Attenborough joins the hunt to bring this ancient creature's story to life. Using state-of-the-art scanning and CGI, the team reconstructs the skeleton, creates the most detailed animation of an Ichthyosaur, and unravels an age-old murder mystery!