However , the robots had been aware of one other human in the city , and that person had recently been murdered .
It is immediately apparent that the city has peculiar properties in that buildings appear and disappear overnight and the entire population is composed of robots .
The robots had been aware of one other human in the city , and that person had recently been murdered .
It is immediately apparent that the city has peculiar properties in that buildings appear and disappear overnight and the entire population is composed of robots .