Judith Atherstone goes to her father's South African diamond fields not knowing that he is nearly broke. Atherstone's wealthy neighbor, Ox Lanyon, entrusts his diamond fields to Atherstone while he attempts to rescue prospectors endangered by a Zulu uprising. Believing Ox to be dead, Atherstone, encouraged by his engineer Caton Cooper, who loves Judith, uses Ox's wealth to keep Judith in luxuries. When Ox returns demanding his fortune, Atherstone and Cooper fight him, and, although they are bested, they retain Ox's wealth. For revenge, Ox takes Judith to the desert, where, near death, she is given the small amount of water he finds. After they are saved, Judith realizes his sacrifice and falls in love. When Cooper finds them, Judith saves Ox by saying they are married. She returns to her sick father's house where Cooper dies a coward when they are attacked by Kaffirs. After soldiers brought by Ox quell the revolt, Ox forgives Atherstone and marries Judith.