Cry of the Black Wolves (1972)

Halfwit Indian Akaena promises a fictitious treasure to anyone who takes her down south where the sun always shines. Trapper Bill Robinson, an honest fur trader in Alaska, refuses to sell his dog sled to dishonest miner Mike Williams, who steals it at gunpoint. While Akaena proves unable to keep her promise, Mike is shot before he can kill her. His corps is found on Bill's sled, making him the suspect as conniving outlaw gangs arrive in town.