In 2149 AD, due to overexploitation, population explosion and excessive pollution. The ecological environment of the earth is getting worse and worse, and the whole planet is gradually dying. Although scientists have made a lot of efforts to change the status quo, the status quo is irreparable. At this time, some scientists have put forward a theory that it is impossible to reverse the current situation of the earth, but we can try to travel back to the past through time travel, so that the elites of the present can go back to the past. this can be avoided by reshaping the process of human development. Jim (Jason O'Mara Jason O'Mara) is the tenth elite team to travel in time, and a whole new earth appears in front of them as they pass through the portal. With dense vegetation and many animals, the sight of prosperity and prosperity surprised this group of people in the future. However, on the earth 85 million years ago, it was not as calm as imagined. Various crises continue to appear in front of the pioneers. How will they deal with them? can they reshape the course of human development?