In the  golden age of the Mississippi, the majestic river held a fragile nation together-and threatened to tear it apart...The Landowner:The river offered Clifton Stewart a chance for a new life. And along with it, many chances for death. The Candidate:Senator Stephen Douglas was running for President, and he was the nation's only hope for peace.The Assassin:Genevieve St. James was delicate,charming beauty. But underneath was a killer ruthless as...

Passing through New Orleans, Lucky Luke stumbles upon a heated argument between two steamboat captains. The argument soon turns into a wager: whichever boat reaches Minneapolis first after steaming up the Mississippi will win the exclusive rights to the route. Captain Barstow quickly invites Luke to travel on his Daisy Belle, fearing that his opponent will cheat. And while he's not wrong, the biggest danger to both boats remains Old Man River himself...