When the "entropy tide" swallows technological civilization, nanomachines and organic life forms merge into "threshold mutants", and the steel jungle becomes a hunting ground intertwined with flesh, blood, rust and iron. While dismantling a scrapped mecha, Mo Yi accidentally came into contact with the fluorescent spores in the test tube, causing them to symbiotically grow with the nerves in his left arm, gaining the "rust-tracing" ability to control metal dust. When he was tracing the source of the spores, he discovered that the catastrophe was caused by mankind's out-of-control experiments on "anti-entropy technology", and that the evolution of threshold mutants coincided with the lost totems of ancient civilizations. As Mo Yue penetrates into the mutation matrix known as the "Remnant Network" and gradually uncovers the triple mystery of spores, threshold mutations and human genes, an adventure begins to find the spark of civilization in the maze of technological debris and flesh and blood.
