Maria Alvarez (Moreno) is a spirited young woman who lives in a small rural community outside Bogotá. She spends her days stripping thorns from long-stem roses at a commercial flower plantation. The work is mind-numbingly dull and pays meager wages, but they are wages that support not only Maria but her entire family: a mother, grandmother, sister, and infant nephew, all of whom live under one roof.
Maria's life outside work is equally unfulfilling. Everybody around her, from her family to her boyfriend Juan (Wilson Guerrero) to her best friend Blanca (Yenny Paola Vega), all seem to just accept life as it is, whereas Maria yearns for something better -- though she doesn't know exactly what that is. Complicating matters, she suspects that she is pregnant.
Fed up with the way she is treated at work, Maria impulsively quits her job, much to her family's consternation. In a country where 80 percent of the rural population lives in poverty, prospects for finding more work are slim.
Through an acquaintance, Maria learns of a lucrative but dangerous form of employment: transporting drugs from Colombia to the United States. So-called "mules" must ingest upward of 100 pellets -- two-inch-long rubber capsules filled with heroin or cocaine -- then get through the airport without raising the suspicions of immigration or drug officers. The risks are great: arrest and incarceration; death if a pellet breaks in your stomach. But a single drug run can net the mule $5,000, which is nearly three times the average annual income in Colombia.
Maria befriends Lucy (Guilied López), who is about to undertake her third trip as a drug carrier. She turns up on Maria's flight -- as does Blanca, who, against Maria's wishes, has also signed on as a mule.
The situation begins to unravel shortly after takeoff when Lucy becomes ill. Once in New York, customs officials are suspicious, and the drug contacts assigned to meet the girls play rough. Afraid for her life, Maria seeks out Lucy's sister Carla (Patricia Rae), who has been living in the city for several years but knows nothing of her sister's involvement with drug traffickers. Maria herself must find the inner strength and resources to deal with the precarious position she's been thrown into.
Moreno shared the Best Actress Award at the Berlin Film Festival with Charlize Theron of Monster, quite an accomplishment given that this is her first professional acting job. It is not an easy role. Maria is a complex character -- opinionated, frustrated, and not always likable. Aside from a few flashes of irritation or outright anger, however, she betrays little outward emotion. She does not ask for the audience's sympathy, nor does she seem to expect it as a given.
Marston, who stuck to his guns and made the film in Spanish with a completely Latin cast, keeps the story low-key while creating a believable sense of jeopardy and tension. Rather than sensationalize the drug angle, he keeps the focus on Maria, making this her story first and foremost.
Still, it is precisely the scenes of Maria and the heroin capsules that will keep some viewers at an emotional distance from both the character and her story. It's not about being judgmental; it's involuntary throat spasms brought on by watching somebody else gag and nearly choke. The physical identification is so strong that it actually takes the viewer out of the movie.