Kai Kudou belongs to Ashurum, an elite organization of psychics. He is dispatched on a mission to apprehend unregistered illegal psychics in the city of Gald. However, he separates from his companions and is taken in by Yuuki Tokugawa, an odd-job-man currently working for the guerillas opposing Ashurum. As Kai spends more time with Yuuki and his mysterious sister Asuka, he begins to question Ashurum's purpose: are they trying to protect the psychics or control them?