In New York City 1880, the Dalton brothers (Joe, Jack, William and Averell) escape from a court trial regarding the Daltons' bank salesman cousin disgracing their name and plunder several banks across New York, while Lucky Luke hunts for them. Upon placing their loot of stolen cash in an empty wagon at Central Park, New York, which was in construction at the moment, and attempting to blend in with the crowd in order to avoid detection from the police, Averell unwittingly blows their cover in front of the police, resulting in a wild police chase across New York.

After the chase, the Daltons head back to Central Park in order to retrieve their loot, only to find more wagons with immigrants going to California. Lucky Luke arrives to captured the Daltons when Piotr, the leader of the immigrants from the wagon train, welcomes Lucky Luke and later on exposes their problem to them: They have 80 days to go to California and to take possession of their land, if not the developer, a man named Crook, having put 12 caravans in danger so that they do not arrive in California with his partner Bartleby, keeps the money paid in advance without the sale being made. With that in mind, along with Joe convincing him to help them just to stay and find the loot, Lucky Luke wants to take the safe route to California, but since the immigrants got 80 days to get there and the safe route would take about 6 months, he instead decides to take them through the unsafe route, which takes them through a small town called Hole Gutch, crossing the Deadly Desert of Death, and passing through the Indian tribe of the Crazy Wolves.

Among the other immigrants headed for California include a Chinese chef couple, a teacher with unruly children named Miss Littletown, a trash-talking driver for a pack of mules that transport the Daltons and a barber among others. Along the way, Crook and Bartleby sow traps in order to prevent the caravans from going to California, but to no avail. Crook then later on tries to help the Daltons escape, but Joe refuses until he finds the loot in the wagons. Later, Lucky Luke and the caravans stop at Hole Gutch, where they pick up some new immigrants who also want to go to California including Rantanplan. During this, after failing another attempt on freeing the Daltons, Crook drains the water for the settlers who were thirsty in the Deadly Desert of Death. Joe tries to make the settlers have a union against Lucky Luke but Averell does a crazy rain dance by accident, all because of a cockroach was in his shoe, even told three roaches how bad it was in Averell's shoe.

When they get close to California within 24 hours, Crook makes one final trick to blow up the old bridge between the canyon using a cannon from the circus, same one that he brought the gators from when he tried to stop Lucky Luke near the Missouri river which failed to see the gators turned into accessories. With the next bridge being far away for 6 days to travel, Miss Littletown suggested to turn the wagons into hot air balloons and fly over the canyon. With some of the wagons now in the air, almost for the furnal wagon, the water wagon, and the Chinese chef's wagon being made of ladies' underwear, Lucky Luke and the immigrants make it to California and take possession of their land, only to discover that they get the bad side of California, showing it to be an old gold mine. Realizing Crook tricked them and that he has made a dozen of settlers fail to get to California, the settlers plan to hang him high but before they do, Joe promised them some money they hid in their wagons earlier. However, Averell already found them after they picked up the other immigrants in Hole Gulch and hid the loot in their ball and chains. This changes Joe's mind but not the settlers.

The Daltons flee with their stock into the abandoned gold mine, resulting in a chase in the form of a roller coaster ride between the settlers, Lucky Luke, Rantanplan and Crook. Finally, after all of them leave the mine, while Lucky Luke saved Miss Littletown and her students, the Daltons are defeated by Luke but Crook arrived with a stick of dynamite, demanding to give them the loot of the Daltons in the balls. Suddenly, as Crook makes his escape, a mega explosion was caused by the dynamite now fetched by Rantanplan, destroying the loot the Daltons stole and allows the settlers to discover gold under the sold lands. The film ends with the Daltons, Crook and Bartleby being tied up and sent to justice by Lucky Luke into the sunset.

French edit

• Lambert Wilson as Lucky Luke
• Clovis Cornillac as Joe Dalton
• François Morel as Rantanplan
• Alexis Tomassian as William Dalton
• Christophe Lemoine as Jack Dalton
• Bernard Alane as Averell Dalton
• Edgar Givry as Edgar Crook
• Michael Lonsdale as Harold Bartleby
• Éric Metayer [fr] as Piotr/Monsieur Tang
• Dee Dee Bridgewater as Molly
• Jean Piat as Spike Goodfellow/Le Croque-Mort
• Titoff as Monsieur Pierre
• Dorothée Pousséo as Miss Littletown/L'Institutrice
• François Seiner as Ugly Barrow
• Marie Vincent [fr] as Louise/La Jument
• Adrien Antoine [fr] as Jolly Jumper
• Jacques Frantz as Loup Cinglé
• Pierre Baton as Old Timer
• Yves-Robert Viala as Le Policier à New-York
• Jacques Obadia as Le Directeur du cirque
• Marc Alfos as Le Costaud du Saloon
• Saïd Amadis [fr] as L'Avocat de L'accusation
• Julien Chatelet as Morris/Goscinny/Un Pionnier
• Michel Vigné [fr] as Barman/Shérif
• Jean-Marc Pannetier as Le Cissier de la Banque
• Luc Boulad as Vrai Faucon
• Sylvain Corthay as Le Juge

Québec edit

• Stéphane Rousseau as Lucky Luke
• André Ducharme as Joe Dalton/Jolly Jumper
• Éveline Gélinas as Miss Littletown
• Violette Chauveau [fr] as Louise
• Philippe Martin (actor) [fr] as Monsieur Pierre
• Yves Pelletier as Jack Dalton/Piotr/Rantanplan/Monsieur Tang
• Bruno Landry as Averell Dalton/Barrow/Loup Cinglé
• Guy A. Lepage as William Dalton/Crook
• Bernard Fortin [fr] as Bartleby

English edit

• Marcel Jeannin as Lucky Luke/Rantanplan
• Mark Camacho as Jolly Jumper
• TBA as Jack Dalton/Willam Dalton/Joe Dalton

A video game based on the film was developed by Tate Interactive and published by Atari Europe in 2007 for the Nintendo Wii, Nintendo DS and Microsoft Windows.^[4][5]

• Go West! A Lucky Luke Adventure at IMDb