Jiang Wan of Linchuan City Anji Mental Hospital has been hospitalized for ten years, sunbathing on time every day, insisting that she is a sword immortal guarding the mortal world. No one knows that everything she casually says comes true. When she says it will rain, torrential rain pours; when she says evil ghosts should be gathered, they end up in pickle jars; when she says villains should be eradicated, a three-hundred-year-old demonic sect collapses overnight. The Town Demon Bureau blew up its ancestral spiritual mirror instrument for her, cultivators across the city lined up at the hospital gates begging for an audience, and demon lords and ghost kings knocked on her door one by one to seek guidance. Yet she established only one hospital rule: wait in line, this fairy will talk after she finishes sunbathing. When she says she guards the mortal world, the mortal world is truly guarded. Because this sword immortal means what she says and never breaks her promise.