Yael, a ghost who has wandered half his life, surprises authorities by wanting to surrender and help rebuild civilization. His request sparks disbelief and a high-level investigation that traces his signal to the forbidden Level-1 Zone of River City. Meanwhile, Yael unexpectedly receives the title of City Lord of River City and an SS-rank item, the Star Crystal, from the Federation, tempting him to officially join their ranks. As those who once pursued him realize the tables have turned, Yael faces a pivotal choice that could change his fate and challenge his former hunters.