The action never stops in this western, which has a surprise ending. Ann-Margret stars as Mrs. Lowe, a widow who wishes to recover some gold stolen by her husband and hidden away. She says she wants to return it to the bank it was stolen from and clear her family name. In order to do this, she persuades Lane (John Wayne) to ride into Mexico with her and recover the loot. Once they cross the border, they discover two very different pursuers: a large group of bandidos, and a lone horseman who seems to know their every move (Ricardo Montalban).