When a former convict at the penitentiary where Rin Tin Can ‘works’ passes away, he leaves his entire fortune to ... the stupidest dog in the West! The inheritance includes multiple buildings in Virginia City, including most of Chinatown, which isn’t to everyone’s taste. Even worse, the will states that if anything should happen to Rin Tin Can, everything would then pass onto ... Joe Dalton. Following the inevitable escape of the four Daltons, Lucky Luke will have to protect the canine millionaire!

The 75thadventure of Lucky Luke, and the Old West at its funniest!

Arriving in Cattle Gulch, Lucky Luke runs into an unexpected scene: an apparent crackpot called Ovid Byrde is about to get lynched. The man’s revolutionary opinions – animal welfare and the sanctity of life – aren’t particularly well-received in this town full of ranchers and cowboys! After Luke intervenes, though, the locals simply ignore Byrde ... until he suddenly finds gold, and a pack of unscrupulous bandits take advantage of the poor idealist to establish a vegetarian dictatorship!

Grand Duke Leonid of Russia is in Washington to sign a commercial treaty on behalf of the Tsar. But this larger-than-life aristocrat has read too much Fennimore Cooper and wants to visit the West. The US government is forced to agree to his whim - but wisely chooses Lucky Luke to escort him to the cattle capital of the West: Abilene. A good thing too, because the Russian Grand Duke encounters real American desperados on his visit!

Lucky Luke enters a small town to drop off at the sheriff’s office a young man who tried to steal Jolly Jumper. A few miles down the road, in the middle of nowhere, he suddenly finds himself threatened … by a little girl! Young Rose and her brother are currently alone in their cabin after the mysterious disappearance of their parents. Luke will have to investigate, but also take care of two particularly wild and undisciplined children!

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 ...

The Lonesome Cowboy is not having a good day. Out of tobacco, arriving at night and under pouring rain in the small mining settlement of Froggy Town, he soon finds himself in conflict with two of the Bone brothers, somewhat infamous local figures. Unfortunately, Luke’s reputation precedes him, and when the townspeople ask him to investigate a hold-up in place of the sheriff – none other than James Bone – the tension ratchets up another notch ...