é Returned to their penitentiary by Lucky Luke for the umpteenth time, the Daltons meet a troubling character: Dunkle, a self-proclaimed prophet fond of fiery speeches. His continual preaching eventually converts the ever hapless Averell. Soon, all five escape together and find refuge in a friendly, welcoming community, where they sow chaos and discord each in their own way - unaware that Lucky Luke is already tracking them ...

If the Old West is so well known, it's in no small part because some of its own legends made sure they were recognised in their own time - like Buffalo Bill Cody and his Wild West shows. When Colonel Cody asks Lucky Luke to join his show, though, the lonesome cowboy humbly refuses, before jokingly suggesting recruiting the Daltons instead - after all, their stupidity is quite legendary! A simple jest that will lead to many high jinks...