In 3002 AD, mankind entered the cyberpunk society. The upper class controlled wealth and absolute power, while the lower class was in the 21st century and was called "slum" by the upper class. A nuclear war among the upper class for power destroyed the earth. More than 100,000 surviving humans, led by their leader Wang Liang, went to the inner road to the last pure land and built Qimen City under the command of the genius mechanic Zhang Wenlong. Alien Yinshi has caused a large number of cockroaches to mutate. What should humans do when technology regresses back to the 17th century...
