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A girl who stayed up late for a long time and died suddenly was brought to a plane on the verge of destruction by a little girl who traveled around the world, and possessed the body of a dying genius girl. Combine the practice systems of the two planes, experience sect life, and travel and adventure in the plane continent. Orcs, ancient beasts, undead legions, and the truth behind time travel.

In ancient times, the World Tree collapsed, the Underworld was established, and the Age of Ending Law began. The glory of the Soul Master was buried in the long river of history. Decades ago, roars came from the underworld and chaos began. A girl who can see spirits begins to come into contact with a different world because of meeting a strange person.