In the Old West, fake doctors may have to answer to the Lonesome Cowboy. In this early adventure of the famous cowboy, Lucky Luke is dealing with one of the plagues of the Old West: quacks. ‘Doctor’ Doxey is a con man, a charlatan who brews up useless elixirs and sells them as miracle cures for every ailment known to man. But he doesn’t stop at that and occasionally causes illnesses himself, the better to cure them, a behavior that does not sit well with Luke.