A Mexican community is slaughtered by Confederate troops; the lone survivor, a boy, is taken in by a preacher. Years later, the boy is now a soft-spoken, devout young man with perfect shooting skills (despite being a pacifist). On his journey to help his half-sister out of a complicated situation, he crosses paths with the men who killed his family, unbeknownst to him.
The professional mercenary Sir William Walker instigates a slave revolt on the Caribbean island of Queimada in order to help improve the British sugar trade. Years later he is sent again to deal with the same rebels that he built up because they have seized too much power that now threatens British sugar interests.