"Named for the atomic bomb, Native American Johnny Firecloud returns from Vietnam to a desert town controlled by a white-trash bigot named Colby who hates Indiands in general and Johnny in particular. Enraged that his daughter is in love with Firecloud, Colby catches them together, whips the bejesus out of Johnny and has him tossed in jail. Worse, Chief White Eagle, Johnny's drunken grandfather, sobers up enough to demand Johnny's release and, instead, the poor guy is promptly lynched. All of which leads to Johnny escaping from his cell and staging a one-man Indian massacre against Colby and his racist cronies that begins with a good old-fashioned scalping…