Three hundred years after the nuclear war, civilization has been reduced to ashes.
The survivors huddled in a giant steel city called "The Barrier", relying on the AI system left over from the pre-war to maintain operation. During an exploration of a restricted area, young scavenger Lu Jin accidentally fused a mutilated "Book of Ashes" - the ultimate database sealed before the destruction of the old civilization, and also the evidence that the AI system wanted to destroy no matter what.
From then on, he had an ability that should not exist in the world: [Shadow Retrospection] - touching any wreckage, you can see the last seven seconds before its destruction.
