A group of friends travel to a wilderness area to play a survival game. Soon they unexpectedly find themselves in a real-life survival situation.

When the grandson of a gun wielding woman is murdered by neo-nazi surf punks in the post-apocalyptic future, this grandma hunts them down for some bloodthirsty revenge.

The 1854 Wyoming historical drama is based on Tom Shell’s adaptation of the true life memoirs of Pony Express rider Nick Wilson.