A woman who loves jewels is a gangster's lover.When he takes her precious necklace ,she gives him away to the police . Fearing his vengeance,she sails away to South Africa ,where many emigrants intend to work in the mines there. During the voyage,the heroine seduces men ,first a poor unlucky human wreck ,then a handsome lieutenant who is demoted when the captain discovers she shares his cabin. The emigrants realize they are not welcome in their new country but they rebel.