In the doomsday world swallowed by the "Crimson Sea of Sand", the "New Lonely City" is the last neon sign of human civilization. This steel city protected by a giant energy shield retains the technology and order of the old world, but it has also become the target of all coveters in the sand sea.
The first protagonist, Rin, is a special "relic hunter" in Xingu City. He has the rare ability to communicate with the "data ghosts" of the old world, and can awaken the remaining fragments of information from discarded electronic devices. He is calm, perceptive, and has an almost paranoid desire to explore the history of the old world in order to find the truth about the "Great Annihilation" that led to the collapse of civilization.
The second protagonist, Zero, a girl whose identity is a mystery, suddenly appears on the edge of the new lonely city. She knows nothing about this world, she is like a blank sheet of paper, but she possesses the mysterious power to calm the violent creatures in the sand sea. There seems to be a key to changing the entire wasteland hidden in her body.
When Rin met Zero in order to investigate a bizarre "data theft case," he discovered that this seemingly harmless girl was actually an "ultimate relic" from the old world. Her appearance not only broke the fragile balance of Xingu City, but also attracted the most terrifying threat from the depths of the sand sea. In order to protect the last spark of civilization and uncover the ultimate mystery of the world, a "light picker" and a "key" will join hands to embark on a dangerous journey through wind, sand and lies. What they will face is not only ferocious mutated creatures and survivor forces with their own hidden agendas, but also a shocking secret buried under the dust of time that concerns the survival of mankind.
