In the apocalypse of the "Red Tide", an intelligent nano-catastrophe that devours metal and flesh, sweeping the world, humanity is surviving in the last giant eco-city "Ark".
Xiao Feng, the "Battlefield Shura", controlled the giant god soldier Caliban with a mortal body. He fought until the last moment, but died of exhaustion due to conspiracy and betrayal.
Ling Chen, the "rat behind the scenes", controlled the world with his cleverness and resourcefulness, and had endless resources. However, he was backlashed by the out-of-control thing he created with his own hands, leaving no trace of his body.
When the darkness of death dissipated, the two were shocked to find that they had both been reborn ten years before the disaster, a golden age when technology was at its peak and undercurrents were surging!
We were enemies in the past life, but in this life we have taken different paths to reach the same destination. One possesses future information and black technology blueprints that are enough to subvert the times, and one possesses highly refined combat skills that surpass human limits.
In this sinful city where steel and neon intersect, they will rekindle the craze of the times from the perspective of a reborn person. Should they continue the old grudges from their previous lives, or join forces to fight against the "red tide" that is about to swallow everything?
This time, they not only want to survive, but also want to find out the ultimate secret hidden behind the catastrophe at the end of human nature and technology!