When technology achieves further breakthroughs, the worlds overlap, and ghosts and monsters appear one after another to swipe their faces.
Ghosts are not something to be afraid of, but the trouble is the monsters. The zombie drought demon makes the whole world dry, Kawakami Tomie confuses all men, the siren sea monster floods the entire land, and there are mountain and sea monsters... There are endless.
Facing the increasingly harsh living environment, if human civilization wants to continue, it must give up its flesh and blood body and achieve mechanical ascension in the form of ghost consciousness.
Zheng Jiahao was the first to participate in this ascension experiment...
(Basically, the monsters are not repetitive. They become more novel as you go to the back. Only after you become a ghost do you have special abilities and become stronger in alternative ways.)