

Zeke Larson, a transmigrator from the modern world, wields the Demonbane System—a cheat that lets him master deadly combat techniques. Newly enlisted in Drosa's Demon Wardens, he rises from novice soldier to captain, then major, as he slays demons and dismantles shadowy conspiracies.Alongside allies Tristan Clark and Luna Sawyer, he navigates a treacherous realm of deception and demonic threats. From an ordinary man, he becomes a legend whose name alone sends shivers through the demonic hordes.

When Angela Grant, the heiress of the Grant family, learns of her boyfriend's betrayal, she immediately rushes to his wedding with his mistress. Unfortunately, she ends up being drugged and saved by Jerome Smith. Five years later, Angela disguises herself and crosses paths with Jerome again. When Jerome suspects her identity, she tries to brush it off. However, when two mini versions of Jerome appear, he pins her against the door and asks, "Ms. Grant, how are you going to fool me this time?"

In 2287, humanity is extinct, and Earth belongs to vampires and werewolves locked in a century-old war. When vampire archivist Veyra discovers a preserved human skeleton and a forbidden biology textbook, she begins questioning everything her kind believes about the past. Meanwhile, werewolf scout leader Elon learns that his sacred symbols are actually relics of human civilization. Their investigations lead them to the Dead Zone, where they uncover a terrifying truth: humanity vanished in a single, unexplained moment. Hunted as heretics, Veyra and Elon must join forces with a mysterious AI to uncover the truth behind humanity's extinction before history repeats itself.