In the future wasteland world, the development of artificial intelligence and mecha technology has caused sudden changes in the structure of human society. Lin Jifeng and a group of other teenagers went through a test at the Mecha Academy and met Cheng Youran, Luo Xian and other partners, but they were accidentally involved in the conspiracy of the rebel Su Mo. In the collision of swords, mechanics and philosophy, the foursome not only fight to save their loved ones, but also think about technology and human hearts. Through mecha competitions, apocalyptic adventures, and mutual hostility among comrades, the truth about the world and one's own life experience is gradually revealed. In the end, the team grew into real guardians in the battle, completing self-atonement and heroic redemption in a funny and passionate way.