Lin Yu was an orphan who transmigrated at the age of seven into an apparently ordinary "parallel world" and was adopted by a warm family of four. At seventeen, he stumbled upon the terrifying truth hidden in this world: most of the relatives and friends around him were horrifying "yao" in disguise. Humanity was a mere drop in the ocean, and anyone exposed as human would be hunted down without mercy. At the edge of life and death, Lin Yu activated the "Insight" System. With its help, he began an adventure of struggling to survive in a world of yao, uncovering the truth, and protecting humanity.
