在人类灭绝、地球处于后世界终局状态的世界里，工人机为了生存并打败“杀手无人机”之类的流氓机器人而不断努力。InaworldwherehumanityisextinctandEarthisinapostapocalypticstate,workerdronesstruggleandtoiltosurviveanddefeatroguerobotscalledMurderDrones.