Buck Madden, a sportive cowboy, backs his pinto against anything on the reservation for speed. Chief Swiftwind puts up all his possessions on his own horse. Being shy on cash, he puts up White Fawn. The cowboy wins the bet, but will not accept the girl, as his wife is due at his ranch that very afternoon. White Fawn, however, is obsessed with the idea that she belongs to Buck Madden, and she bobs up serenely wherever he goes, much to his embarrassment, until he seeks the protection of his wife who explains the release to the matter-of-fact maiden.
—Moving Picture World synopsis