Nex Nituro is a mercenary who doesn't remember who he is or where he came from. The only thing he has is a note that he apparently wrote himself telling him his name and occupation. When he is approached by Chanel Black, a member of the Storm Sentinels, a group of supernatural fighters who use their power to protect their nation; Chanel makes Nex an offer. If he assists and joins the organization, they will provide the assistance he needs to learn the truth about his missing past.