A butterfly collector unwittingly wanders into an Indian encampment while chasing a butterfly, but the tribe has resolved to kill the first white man who enters their encampment because white oil tycoons are trying to force them from their land.

Sheriff Halliday doesn't approve of his children dating or marrying half-breeds and his blind hate threatens to alienate his whole family.

Forced to trade his valuable furs for a well-educated escaped slave, a rugged trapper vows to recover the pelts from the Indians and later the renegades that killed them.

Beautiful half-breed Pearl Chavez becomes the ward of her dead father's first love and finds herself torn between her sons, one good and the other bad.

John Travers and Yak, his faithful Indian sidekick, pick up where a murdered sheriff leaves off, and try to nab the mysterious Shadow.