Patient E-1101 was never meant to remain asleep. But when an error during a secret government experiment traps Lu Shian deep within his subconscious, his body lies motionless while his mind builds a world of illusion. Inside his dream, Lu Shian believes he's just an ordinary employee burdened by daily struggles and an ironic dream-to open a cat café despite his allergy to cats. His life shifts dramatically when memories of a past life surface, along with a mysterious Tycoon System that grants him unlimited wealth. Yet there's a catch: his fortune is useless in the real world and only holds value in the Underworld, a realm ruled by horror games, guild wars, and the currency of survival. As Shian climbs the ladder of power in this fabricated world, he begins to believe he's in control of his destiny-until fragments of reality bleed through. The truth hits harder than death itself: his memories are false, his achievements staged, and his existence nothing more than a digital experiment.