The story concerns two grizzled mountain men -- Bill Tyler (Heston) and Henry Frapp (Brian Keith) -- during the dying days of the fur-trapping era. The plot begins when Running Moon (Victoria Racimo) runs away from her abusive husband Heavy Eagle (Stephen Macht) and comes across the two seedy fur trappers. The mountain men take her in, unaware that Heavy Eagle has dispatched an army of Indian braves to reclaim her.