2112, The fifth year after the end. In the last shelter in the capital base, Xie Lin stuffed the last piece of moldy bread to the child with a broken leg. He was so hungry that stars appeared in his eyes. The steel door behind them rumbled as it was hit by zombies - just when everyone thought they were certain to die, a silver-white train tore through the space and rushed towards them. The car door opened with a bang, and the electronic voice sounded bone-chilling: "Welcome aboard, Xie Lin. You are paid for the right to travel through time and space, but the price is that every time you return, the apocalypse will turn into a zombie twenty-four hours earlier." Xie Lin licked his chapped lips and stepped into the car. It doesn't matter, he has memorized the death list for the entire apocalyptic decade. As long as we could go back to this morning - no one could touch his piece of bread.