Nomadic cowboys, drifters, troublemakers - Snake and Dog-man have heard it all, but they are more than that, they're strong, determined, and never back down from a fight.

Continuing their trek to California by guiding a freight wagon train to Tucson, Arizona Territory Snake and Dog-man run into trouble when they meet a family along the way. From there, the trouble never stops, and gun fights, injuries, and death ensue.

Once in Gila Bend, Dog-man learned that steamboats ran between Yuma, Arizona Territory and Guaymas, Mexico. Since it was on the way to California, they made the ride to Yuma, only to find themselves in more trouble.

The drifters knew they had to continue their trek to California - it was then they realized it was the open road, the unknown over the horizon that was most important to them.