The "grey disaster" came, and the civilized surface turned into a dead zone in the silent crystallization. The surviving humans huddled underground and built shelters to survive in the darkness and competition for resources.
Chu Yuan, who was once the founder of "Apocalypse", the strongest shelter in the underground world, was betrayed by his close friends and confidants when he was only one step away from reaching the highest power in the underground. He was sealed in a special crystal coffin and sank into eternal darkness.
When he opened his eyes again, he found that he had returned to the early days of ten years ago, not long after the "Gray Disaster" came.
The betrayal of the past has turned into the coldness that sees through people's hearts now; the regrets of the past have become the cornerstone of the future.
More importantly, in the cycle of death and rebirth, his soul formed an indescribable fusion with the origin of the "Grey Scourge".
Crystallization is synonymous with death and despair to the world, but to him, it is a power that can be controlled at will.
While others were still struggling for a piece of bread and a handful of clean water, Chu Yuan had already embarked on the road to reshape the underground order.
This time he wants no allies, no partners.
He wants to turn the entire underground world, from the rock formations to the core, into his own domain.
He wants to be what everyone looks up to and fears but can never touch - the sky beneath the earth.
