It tells the story of the Milky Way in 2742 AD. After experiencing the "Great Stripping" disaster, the interstellar channels were broken and civilizations were scattered in the lonely star field. While tracking a mysterious stardust signal, mechanic Karen unexpectedly became the sole survivor of the Rusty, and was involved in an ancient secret concerning the balance of the universe.
She discovered the ruins of the Stardust civilization in the cocoon of light in the Forgotten Star Territory, and learned that she was a descendant of the "Stardust Craftsmen" and was responsible for restarting the "Star Bridge" that connected scattered civilizations. However, when the Star Bridge gradually revives in her hands, the power of "Dark Dust" that was considered taboo also emerges - her cousin Kane, an "alien" who is considered to be bound to Dark Dust, appears with the shadow of Obsidian Capital, revealing the truth that Star Dust and Dark Dust are two sides of the same coin.
From the rusted spaceship to the secret realm of the Light Cocoon, from the dark dust core of the Valley of Ashes to the crisis at the Starbridge Hub, Karen and Kane explore the balance between opposition and understanding. Not only do they have to fight against the careerists who try to use Dark Dust to monopolize the Star Bridge, they also have to face civilization's fear and prejudice against unknown forces, and they also have to solve the mystery of the bloodline left by their grandfathers. When the silvery white of stardust and the inky black of dark dust intertwine in the twin flowers, an exploration about trust, choice and the origin of the universe slowly unfolds in the sea of stars - it turns out that the greatest star bridge is never an icy waterway, but a civilizational link that connects differences and embraces balance.
