The deadliest thunder that ever rolled across the West!

Mangas Coloradas (Lex Barker), an Apache chief and white trader Luke Fargo (Ben Johnson) are bound by friendship and their mutual love for Riva (Joan Taylor), a Mexican-Native American girl rescued from horse thieves. Riva marries Mangas, who teaches her the warrior's ways and she later warns the Apaches of an ambush by white soldiers. When Fargo, who did not intend an attack, is injured, Riva helps him - a kindness he must choose whether or not to return when war with the Apaches erupts.