In the future, dinosaur infested jungles have reclaimed the world and humans live in disparate tribes. As the story opens, ambassador Hannah Dundee and her convoy are on a diplomatic excursion to the City by the Sea. They are attacked by bandits and Hannah heads off on her own for help. She stumbles upon a cadillac driven by Jack Tenrec.
Jack is an old-blood mechanic of the Machinatio Vitai (The Machinery of Life) who guides how and where humans can expand into nature. Earlier, Jack came across a supposedly protected town which was attacked by a Shivit (basically, a t-rex). Jack needs to decide whether or not to break his code of no killing in order to stop the rogue animal.
What he doesn't know is that the Shivit is being controlled by Hammer, leader of the bandits who attacked Hannah. Hammer, in turn, is working for Wilhelmina Scharnhorst, a member of the council of governors in the City by the Sea. She's opposed to Jack and believes that humans have the right to expand into and plunder as much nature as they see fit. The entire Shivit rampage is just a scheme of hers to discredit Jack so the board will ignore his old-blood ways in favor of her's.
That's a lot of story for an animated series, and that's all in the first act! The rest of the episode is brilliantly plotted by Steve de Souza (one of my favorite screenwriters). Add to that slick animation and design and you get an excellent pilot that, other than some stiff dialogue, is perfect.