Ling Yin and the other male lead were both at low points in their lives. While sorting through the belongings of Ling Yin's late father, they unexpectedly discovered clues closely connected to three unsolved cases. The police dismissed them as coincidences, but Ling Yin, a forensic doctor, keenly noticed strange similarities among the corpses. All the clues seemed to point to a fire twenty years ago whose records had been erased. Just then, they were caught up in a supernatural incident and, on the brink of death, activated the System. However, a mysterious villainous faction, determined to conceal the secrets behind the fire, kept obstructing the protagonists' investigation and creating all manner of supernatural crises. At first, the protagonists struggled to control their supernatural powers and suffered repeated defeats in battles with ghosts and monsters. The cases also led the police and other factions to misunderstand them. Other supernatural forces clashed with them over the struggle for resources as well. But by following the System's path of "leveling up by defeating monsters," the protagonists grew stronger as they completed one mission after another. As their investigation deepened, they uncovered a vast conspiracy behind the cases, and time was running out for them to discover the truth and stop supernatural forces from spiraling out of control. Can the protagonists overcome one obstacle after another, uncover the truth, and become guardians of peace? The answer remains unknown.
