Grandma's final words were: "Never activate the system." When the doomsday comes, everyone receives an invitation to bind to the system, but Xiao He remembers his last words and refuses to activate. She used the inheritance left by her grandmother to stock up crazily, renovate the underground fortress, and record the countdown to the doomsday. Ten years later, as the last human being, she was discovered by zombies. The necklace suddenly glowed with green light, and she woke up and returned to her hospital bed. In my ears, the system's mechanical sound sounded again, "The end will begin in 10 days." Is this a dream or a new reincarnation?