In the Red Mist Catastrophe in 2075, Xiao Zhan, the god of war in the apocalypse, was betrayed by his cronies, the fortress collapsed, and he died together with the mutant emperor. Once reborn, he returned to one month before the disaster, activated the [Doomsday Sign-in System], and signed in every day to obtain supplies, skills, and blueprints.
He frantically stocked up on goods and transformed the safe house, rescuing the biologist Su Qingyue who died for him in his previous life in advance, rescuing the captain of the special forces Ye Zihan, taking in the spiritually awakened pianist Xia Wanqing, subduing the mysterious mercenary Chu Yuxun, recruiting top architect Liu Ruyan, and saving the genius hacker Tang Wan'er.
Each of the six women has unique skills, whether it is scientific research, force, mental power, assassination, infrastructure, or information, forming a unique bond around Xiao Zhan.
Xiao Zhan and his six girls built a steel fortress to control mutated creatures, resist evil forces, and uncover the truth behind the disaster. They eventually became the leader of mankind, led the reconstruction of civilization, and created an apocalyptic legend!