While fishing at a wild lake, Jiang Huan accidentally fell into the water. When he woke up, he was shocked to find that he had become a lighthouse keeper in the Steam Age. Good news: He transmigrated and landed a high-paying job where his monthly salary equals half a year's wages for an average person. Bad news: His workplace is a lighthouse on an isolated island, his only "colleague" is a mummified corpse, and he is afflicted with a curse that makes him hallucinate every day as if he'd eaten magic mushrooms. By day, he inspects the buoys; by night, he fights off hallucinations. Whispers echo in his ears, dark shadows lurk outside the window, and he has a diary filled with the scribblings of a madman. It wasn't until he discovered the mummified corpse, a bottle of "Spirit Vision Potion," and a sharp-tongued ghost who had been trapped for fifty years in the lighthouse's basement— That he finally realized he hadn't taken over a lighthouse at all. What he was actually guarding was the sealing fire suppressing a divine abomination!

Transmigrated into a new world, Lu Yuan finds himself facing hell mode right from the start. A chilling Victorian-style clinic, wriggling mists outside the window, and at his feet—the scaly, mysterious corpse of his predecessor. In this mad world where knowledge equals corruption, Lu Yuan possesses a unique cheat: he can see the [Experience Bar] of all things. Reading forbidden tomes? [Occultism +1] Dissecting Deep Ones? [Anatomy +10] Gazing upon the Unspeakable? [Sanity -1, Willpower +5] While others descend into madness at a mere glimpse of the truth, Lu Yuan decides to use raw data to crush the eldritch horrors. Taking over the clinic, he treats not only human ailments but aberrations as well. He performs surgery on gilled sailors, listens to the dreams of deep-sea kin, and through relentless grinding, transforms cosmic terrors into controllable skills. When the rest of the world loses its mind to the truth, Lu Yuan looks at his maxed-out skill tree, adjusts his monocle, and smiles: "There is no such thing as the supernatural. If it seems that way, it just means I haven't farmed enough XP yet."

Beneath the surface of an ordinary world lurk hidden dangers: the Special Service, Churches, Evil Gods, and Cursed Artifacts. Here, all it takes is drinking a tiny bottle of Potion to gain supernatural powers and step onto the path of the Extraordinary. By sheer coincidence, Freya acquires the ability to simulate the future and create save files. Across countless simulations, she drinks different potions, walks different Extraordinary Pathways, and saves each version of herself. War, Death, Trickery, Sun, Moon, Earth—every save file can be summoned into reality as an independent clone. In reality, the seemingly ordinary petite girl already possesses the terrifying power to stand against an entire nation by herself. And after experiencing countless simulations, she already knows exactly when certain villains will act and what evil schemes they are planning. So what else is there to do? Obviously, eliminate the danger before it can even begin. Show up to fight the beginner boss while wearing a graduation uniform! Villain who has only just started preparing his master plan: "Are you kidding me?! CAN YOU HEAR ME?! ARE YOU F***ING KIDDING ME?!"