The world lies under the boot of the ENE Corporation, a ruthless paramilitary organization led by the enigmatic Lord Ruse. The only force still able to resist is the Oboro, a clan of mystical shinobi who have guarded mankind for centuries under their leader, Joe Musashi. When ENE storms Oboro Village and slaughters nearly the entire clan, Musashi confronts Ruse and his lieutenants but is left with only a handful of survivors. Driven by grief and fury, he sets out across a hostile world on a relentless quest for vengeance against Ruse and the corporation that destroyed his home.