Gina Rovere

After a gang of outlaws hijack a train and murder everyone on board, an insurance agent and a vengeful gunslinger team up to track them down.

Near the end of the American Civil War, an entire unit of one hundred Union sharpshooters vanish into thin air in a rugged, mountainous region. To shed light on their mysterious disappearance, Sugar Colt, a former special agent, superb marksman, and director of a shooting academy, rides into the dusty town of Snake Valley, posing as Doctor Tom Cooper.