In the future city "New Gone City" where memories can be quantified and erased, Ling Su, the top memory liquidator, takes it as his job to erase the pain of others, but he has never been able to touch his own dusty past. During a mission, he encountered a mysterious girl codenamed "Zero". Her memory was like an unshakable abyss, resisting all erasure techniques. This failed "liquidation" not only shook Ling Su's career, but also awakened a forgotten melody in his mind, a dangerous echo that leads to his childhood trauma and the secrets at the heart of the city.
