Skye Fargo isn't looking for work in the rough Wyoming territory, but he gets an offer he can't refuse from J.M Ferriday, who runs the mail through the Oregon Trail. Seems that his wagons are getting robbedand every robbery points to something rotten in Fort Laramie. Ferriday wants the culprits caught by any means necessary. Now, neither rain, nor snow, nor hail of lead is going to stop the Trailsman from sending the desperados a dead letterwith postage due