A global biological mutation crisis breaks out in modern cities. Chen Yue, a street vendor, activates the "Doomsday Sign-in System" on the first day of the apocalypse. Signing in at a fixed point every day can randomly awaken an extraordinary physique (such as steel and iron bones, a fire-bending body, extremely fast walking, etc.). From being a survivor who evaded the pursuit of mutant beasts to being the leader of the "Dawn Base", he relied on the physical advantages he gained through constant sign-ins to lead mankind to counterattack in the wasteland - fighting against the rampaging tide of mutant beasts, outsmarting the survivors' armed forces trying to plunder resources, solving the scientific research mystery of the source of the apocalyptic virus, and finally awakening to the ultimate physique when he checked in on the 400th day, leading mankind to a new life.
