Office drone Jiang Xiaoyu transmigrates into the role of the tyrant's substitute for his white moonlight. To survive, she tries to imitate the white moonlight's overly competitive stand-in, but her commitment to doing nothing is so thorough that the tyrant turns her into a new kind of stress-relief toy. As she lies flat and tries to stay alive, she accidentally heals the mad tyrant. Using modern workplace tricks for doing as little as possible, she crushes the ancient palace harem's schemes, and the lowly salted fish turns the food chain upside down by taming the top predator, the tyrant.