Going to space was supposed to be the adventure of a lifetime, but for Reece Danielson and his crew, it was only the beginning. As the fresh astronauts aboard the Zhengzhou International Space Station start their on-the-job training, Reece is shown a discovery that changes his entire worldview. It isn't long before a tragic accident aboard the station sets off a series of events that not only puts the crew in danger but at odds with each other. The events quickly escalate into a man-made apocalyptic incident on the surface of the planet. A virulent plague is prematurely released which transforms everyone into flesh-eating undead, and that is only the beginning of the troubles. There are far worse things down there than zombies and possibly a few of them lurk on the station itself.