在人类灭绝、地球处于后世界末日状态的世界里,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。 In a world where humanity is extinct and Earth is in a post apocalyptic state, worker drones struggle and toil to survive and defeat rogue robots called Murder Drones.。在女儿李乐安7岁生日这天,陈慧兰带着女儿外出,在陈慧兰离开买东西时李乐安不小心掉进涨水的河里,被路过的富商救走。陈慧兰和李建国这二十年间一直未曾放弃寻找女儿。。