Synopsis by Hal Erickson
Japanese leading man Sessue Hayakawa stars as John A. Ghengle, the Oxford-educated son of an Arab chieftain. Entering into a business partnership with Sir Harry Falkland (Jack Holt), a notorious roue, Ghengle relocates to Sierra Leone, where he falls in love with French-Sudanese girl Maida Verne (Florence Vidor. Upon proposing marriage, Ghengle is turned down and hotly demands to know why. Maida tearfully confesses that she is married to Falkland, but under the present miscegenation laws she must keep her marriage a secret. Ghengle accepts this as possible under the circumstances, but upon learning that Falkland already has a wife in England, he is enraged. The two men struggle, and Ghengle is knocked out and left for dead. Believing himself safe, Falkland is shocked to discover that his British wife has just arrived in Sierra Leone. With no other recourse left to him, Falkland commits suicide, leaving Ghengle (who did not die after all) free to wed Maida. White Man's Law was the third co-starring assignment for Sessue Hayakawa and Florence Vidor, an association which proved beneficial to the careers of both actors.