David Clark is a small-time marijuana dealer in Denver who prides himself on his
professionalism, avoiding any illicit entanglements that might jeopardize his lifestyle. However, his life takes a chaotic turn when he attempts to help a teenager being harassed by thugs, only to have his entire stash and cash stolen by the aggressors. This leaves David in severe debt to his ruthless supplier, Brad Gurdlinger. To clear his name, David is coerced into a high-stakes mission: smuggle a "smidge" of marijuana—which turns out to be a massive two-ton shipment—across the
Mexican border into the United States.Realizing that a single man traveling alone will inevitably attract suspicion from border patrol, David concocts a desperate, elaborate ruse. He recruits a cynical stripper named Rose, a socially awkward neighbor named Kenny, and a runaway teenager named Casey to pose as his wholesome, typical family, the "Millers," for a cross-country road trip in a massive RV. David believes that the image of a suburban family is the perfect camouflage for his illicit cargo.As the makeshift family hits the road, they are immediately confronted with a series of disastrous complications. The RV breaks down, they encounter a goofy, overly friendly DEA agent and his wife, and they are pursued by a vengeful Mexican drug cartel. Tensions flare as the dysfunctional group clashes, revealing their deep-seated insecurities and loneliness. Despite their initial hostility, the quartet begins to form a genuine, albeit unconventional, bond. They learn to rely on each other to survive near-death experiences, including a terrifying encounter with a tarantula and a tense standoff with a kingpin’s henchmen.Ultimately, the mission forces them to confront their personal failures. David realizes he desires a life beyond his petty criminal existence, while the others find the sense of belonging they have been desperately seeking. After a climactic showdown where they manage to outsmart the cartel and the authorities, the Millers successfully deliver the shipment. They eventually decide to abandon their criminal pasts, choosing instead to live together as a real, albeit strange, family. They finally find the home and emotional stability they lacked before their perilous journey began.