An ambitious fur trapper plans to make his fortune in beaver pelts. To do so, he needs a safe passage through lands held by the Blackfoot tribe, so he marries the chief's daughter and together they lead an expedition that takes them deep into the uncharted wilderness. Western adventure, starring Clark Gable, Ricardo Montalban, Maria Elena Marques and John Hodiak.

In the 1830's beaver trapper Flint Mitchell and other white men hunt and trap in the then unnamed territories of Montana and Idaho. Flint marries a Blackfoot woman as a way to gain entrance into her people's rich lands, but finds she means more to him than a ticket to good beaver habitat.