Gold was becoming harder to find as panners by the hundreds swarmed to any site where even the smallest nugget was found. One mine was still operating north of the Sierra Nevadas. And that was the problem. Transporting the gold down narrow, sandy, and rocky trails, wagons were easy targets for outlaws. Despite competition from prospectors, the gold mines still maintain a foothold in the Sierra Nevadas - and that's the problem: wagons transporting gold down narrow, rocky trails are easy targets for outlaws. The Pinkerton Agency has been charged with the security of a large haul of gold, and they have a daring plan. If it works, five hundred gold bars will make it east. If it fails, all will be lost. But unknown to them, the Greeley gang has inside knowledge, and is intent on stealing the cargo at any cost...