After finishing his war with the outlaw motorcycle club known as The Lost Souls, who raped and murdered his wife, Mike McDonald, a Persian Gulf War vet, leaves Green River, Wyoming, heading east. He is looking for a little bit of peace and trying to start a new life, but everywhere he goes, trouble seems to find him.

This time, it comes in the form of a beautiful woman. When he stops in Cedar Glen, Nebraska, he meets Chris Chandler, a widowed rancher who has her back against the wall. A real estate and land speculator named Tom Boxer wants her riverbottom land on the Plate River, and Chris doesn't want to sell. Boxer hires a group of New York gangsters to harass her and rustle her cows. He also extorts the local banker to call in the note on her loan trying to steal her ranch.

What Boxer doesn't count on is Mike McDonald and the Green River boys, a friendly motorcycle club from Green River, Wyoming, that comes to Chandler's aide. To save her ranch, Chris is forced to sell off some of her cattle down in Texas. Mike McDonald and the Green River Boys take the cattle down to Texas, fighting the New York City mobsters all the way. There only choice is to take the cattle to market or die on the road to Texas.