After struggling for seven years in the apocalypse, Wu Han died in the betrayal, but was reborn seven days before the disaster broke out and was bound to the "Book of Merit" system. He discovered that in a world where order is broken, "doing good and accumulating virtue" - that is, actions that are beneficial to the survival of the human group - can be exchanged for materials and strengthen abilities.
Using the rebirth memory and system, he disguised himself as a gentle librarian to anonymously lay out and hoard to the limit before the end of the world. After the apocalypse broke out, he established a team of survivors, based in an abandoned botanical garden, to survive among zombies (madmen), harsh environments and the loss of humanity.
However, the real crisis does not come from monsters: the "sanctuary" conspiracy of the upstart technological upstart's former love rival Chen Xiao, the pursuit of the mysterious and powerful plundering organization "Black Crow", and the power and secrets contained in the ancient ruins "Shennong's Secret Mansion" will all draw Wu Han and his team into a more dangerous whirlpool. He must use the special law of "merit" to find a balance between survival, morality, strength and team bonds, and strive for a glimmer of light in the desperate wasteland.
