In 1928 a U.S. Airmail airplane crashed during a storm somewhere in the Wind River Mountains in Wyoming. The pilot, the plane, the mailbag and a special precious cargo were never found.

In 2013 a cowboy searching for some lost cattle stumbled on a remnant of the wrecked airplane. Because of the precious cargo the airplane carried, this discovery triggers a no-holds barred search for the crash site by competing treasure hunters including some who do not hesitate to kill anyone who gets in their way to be the first to find the crash site and the cargo.

Kit Andrews and Swifty Olson are recruited to find the crash site under the pretext that the search is for the body of the pilot with no mention of any precious cargo. Soon they find themselves in the middle of a fight for their lives in the wilderness area of the Wind River Mountains.