Unexpected Awakening**: Librarian Lin Xia received a mysterious package, and the bronze bookmark was activated on the night of the lunar eclipse, showing the star map projection.
- **Time and Space Crossing**: When you touch the star map, you are transported to the ancient temple and meet the mysterious young man Elan who calls himself the "Gatekeeper"
- **Mystery of Civilization**: Elam reveals that there is a Sumerian interstellar observatory buried under the library, and that there is a hub on the back of the moon to maintain the balance of time and space.
- **Undercurrent**: The black organization "Crescent Alliance" attempts to use the upcoming nine-star continuum to forcefully penetrate the dimension and trigger an energy tide.
- **Fateful Choice**: Lin Xia discovers that she is the last descendant of the Astropath's bloodline and must repair the damaged star orbit matrix before the end of the moon phase cycle.
Concept: Competency Matrix in Library