Broken Trail is a 2006 Western television miniseries directed by Walter Hill and starring Robert Duvall and Thomas Haden Church. Written by Alan Geoffrion, who also wrote the novel, the story is about an aging cowboy and his nephew who transport 500 horses from Oregon to Wyoming to sell them to the British Army. Along the way, their simple horse drive is complicated when they rescue five Chinese girls from a slave trader, saving them from a life of prostitution and indentured servitude. Compelled to do the right thing, they take the girls with them as they continue their perilous trek across the frontier, followed by a vicious gang of killers sent by the whorehouse madam who originally paid for the girls.

Broken Trail weaves together two historical events: the British buying horses in the American West in the late 19th century and Chinese women being transported from the West Coast to the interior to serve as prostitutes. The movie was filmed on location in Calgary, Alberta. The miniseries originally aired on American Movie Classics as its first original film. Broken Trail received 4 Emmy Awards for Outstanding Miniseries, Outstanding Casting for a Miniseries, Movie, or a Special, Outstanding Lead Actor in a Miniseries or Movie (Robert Duvall), and Outstanding Supporting Actor in a Miniseries or a Movie (Thomas Haden Church).

Part 1

In San Francisco in 1898, countless Chinese girls are sold into slavery and brought to the American West to live as prostitutes among the miners and railway workers. Capt. Billy Fender (James Russo) arrives in San Francisco and purchases five Chinese girls to be sold as prostitutes in Idaho.

In southeastern Oregon, Prentice "Prent" Ritter (Robert Duvall), an aging cowboy, arrives at the Gap Ranch to inform his cowboy nephew, Tom Harte (Thomas Haden Church), that his mother died. Estranged from her son years earlier after he left the family ranch to become a buckaroo, she left behind a brief impersonal note informing her son that she left everything in her will to her brother Prent. Uncomfortable with her unfair decision, and wanting to reconnect with his nephew, Prent tells him about his plan to transport 500 horses from Oregon to Sheridan, Wyoming, where he will sell them to the British Army. He offers Tom 25% of the profits if he joins him in the business venture.

After purchasing 500 horses from various ranches in the region, Prent and Tom head out east with the herd toward the Idaho border. Along the way, Prent sends Tom into a nearby town to purchase supplies. At the local saloon, he purchases three bottles of whiskey. When the bartender attempts to throw out an Irish fiddler named Heck Gilpin (Scott Cooper), Tom intervenes and punches out the bartender. He hires the fiddler to accompany them on their venture.

Back on the trail, they meet Capt. Billy Fender and his five Chinese girls. Fender asks if he can follow along and Prent agrees. That night, Fender offers the cowboys sex with one of the Chinese girls, but they decline. Later, Fender drugs the cowboys' whiskey, and while they sleep, he steals their money and saddled horses and escapes with one of the girls (later given the name of #4), leaving the other Chinese girls behind. The next morning, the men realize what's happened, and Tom rides off in search of Fender. He finds him in a drunken sleep after he's raped the girl. For being a horse thief and other transgressions, Tom hangs Fender from a tree and heads back to camp with the girl.

Meanwhile, Prent becomes acquainted with the Chinese girls who are taught to call him "Uncle Prent". Unable to bridge the language gap, Prent assigns numbers to the girls, naming Ghee Moon (Jadyn Wong) #1, Mai Ling (Caroline Chan) #2, Sun Fu (Gwendoline Yeo) #3, Ye Fung (Olivia Cheng) #4, and Ging Wa (Valerie Tian) #5. He first tried to name Ging Wa #4 but she protests that 4 is an unlucky number. When Tom returns with Ye Fung, she is given the unlucky name of #4.