Born from a strange family line, Eren Jäger is an immortal being. in this family line, one person every century is born immortal. After slowly going insane by watching his loved ones die before him, he was admitted to Shinganshina Mental Hospital, which had several years later been abandoned. Levi Ackerman, an vampire always on the run with his two friends Hanji Zoe and Erwin Smith, had gotten separated during a run from hunters. What happens when the two meet when Levi is hurt? Will Eren help? Or leave him behind.