Acid rain corrodes bones, extreme cold closes the city, and doomsday disasters come one after another, turning Qingshan City into a hell on earth.
Lin Mo, an ordinary doomsday survivor, accidentally awakened the SSS-level "Eternal Asylum" talent. Starting from a dilapidated ancestral home in the suburbs, he personally built an indestructible bronze-level shelter.
At first, he struggled to survive among the corrosive insects with a steel knife and a few bombs; later, he built a defensive grid and energy mechas to defend against the frozen behemoths on the extremely cold ice fields; finally, he gathered two hundred followers to rule the entire city, and in the name of "Eternity", he established a fortress of order and hope on the ruins of doomsday.
From the "otaku" hiding alone under the eaves, to the doomsday overlord who controls the mecha and commands the heroes; from the simple wooden house to the steel fortress that can withstand natural and man-made disasters - Lin Mo used 30 days to prove that true eternity is never to sit back and wait for death, but to carve a way out for himself and his companions in desperate situations.
When the acid rain subsides, extreme cold falls, and when other forces are destroyed in the disaster, the lights of the "Eternal Fortress" always illuminate the night sky of Qingshan City, and Lin Mo's story has just begun...