In a world where everything is connected by a fungal network and reflects human emotions, Levi, a top memory surgeon, was accidentally marked by a bacterial vein during an operation and received a near-immortal curse. What he longed for all his life was to heal this long life and find peace. When global fungi grew violently due to absorbing excessive human negative emotions and turned into a "tide of bacteria" that devoured cities, Levi discovered that the strange ice-blue fungus quietly growing on his wrist was actually the key connecting him to the core of this natural disaster. He must go deep into the ancient consciousness of Bacteria and find the untrodden road between saving civilization and completing his own end - perhaps death is not the end, but the beginning of true reconciliation with all things.