After struggling for ten years in the apocalypse shrouded in red mist, humanity's last hope, the "Aegis Barrier", was reduced to ruins amid betrayal and despair. Ling Yuan, as the "Blade of the Abyss" with the strongest barrier, saw his most trusted friend at the last moment of his life and sent the blade into his heart.
When he opened his eyes again, he found that he had returned to three months before the disaster.
This time he no longer trusted anyone, no longer pinned his hopes on fragile alliances. The unforgettable betrayal made him understand that the only one he could rely on was himself.
Also reborn with him was a mysterious object called the "Abyss Core". It can swallow up all energy, build an impregnable underground fortress, unlock black technology that transcends the times, and create an absolutely loyal mechanical army.
While the world is still killing each other for a pack of biscuits and a bottle of water, Lingyuan's underground kingdom is already brightly lit and the seasons are like spring.
While various forces were still using their flesh and blood to resist the crazy attacks of the aberrations, behind Ling Yuan's giant alloy door was a torrent of steel that was enough to crush everything.
He, Ling Yuan, will single-handedly establish an underground order that will never fall in this catastrophe and become the only master of the abyss.
(If there is no heroine, the Virgin will kill decisively. It is an extremely enjoyable story.)
