While escorting a young woman (Jean Muir) to her inherited Yukon gold mine, an adventurer (Michael Whelan) makes an unlikely ally of a wolf-dog he dubs "White Fang." The canine companion continues to prove his worth when predatory locals falsely accuse the tracker of murdering the heiress's weakling brother. Loose adaptation of the Jack London tale co-stars Slim Summerville, Charles Winninger, John Carradine, and, in the title role, Lightning the Wonder Dog. 70 min. Standard; Soundtrack: English Dolby Digital mono.