In a future city where memories can be edited and deleted, "Zero" wakes up in a pure white room and loses all his past. He's told this is a chance for a "new life," but the shattering, screaming flashbacks in his head drive him to flee in search of the truth. Clues point to a mysterious woman named Eve, who seems to be the only knower of his past, but who works hard to prevent him from remembering it all. As Zero approached the core step by step, he discovered that what he was looking for was not salvation, but a sin that he had buried with his own hands and could devour everything. In this sea of oblivion created by himself, is he a victim searching for his identity, or a sinner escaping justice?