After dying suddenly from overwork, office worker Su Ling binds to the Zeroing System and transmigrates across worlds to carry out missions. She coolly observes the grudges of the wealthy, adopts a young dragon in a starry wasteland, and navigates life and death amid the espionage of Republican-era China. As a "variable" skirting the edges of the plot, she refuses to become anyone's salvation or side character. When everything returns to its starting point, Su Ling must make a choice before the world collapses: accept a formatted reset, or break the fourth wall and fight for genuine "uncertainty" in this fake world, now that her stepsister Su Wan has become the world's will. This is a journey about the meaning of existence, and a gentle counterattack dedicated to all the "nobodies."