65 million years have separated the ages of man and dinosaur. Until now. Sometime in the 21st Century, something broke the world. No one knows for sure what happened. Solar flares, war, global warming, pollution and environmental collapse, or perhaps a combination of all of them. Perhaps it was something much stranger. All we know is that mankind fled the surface, retreating into vast underground shelters where they could wait out the centuries until the earth was habitable once more. But when we emerged from the darkness and prepared to retake our world, it was not as we remembered it. Something had happened to the world that once was. In the centuries without man, nature wound back the clock, returning the planet to an earlier, cleaner, more primal age. An age of dinosaurs. Now humanity must choose – do we fight to reclaim our past, or do we make peace with the present and embrace a simpler future? Armed with the skills and technologies of our ancestors, do we struggle to recreate former glories, or will we use the second chance we have been given to avoid the mistakes of the past? Will human nature even give us the choice? Will we exterminate the reborn dinosaurs, enslave them, or something else? What will be our Dinosaur Protocol?