British Columbia's marijuana trade has grown into an industry its own participants call 'The Union,' generating an estimated 7 billion Canadian dollars a year, with as much as 85 percent of the province's 'BC Bud' smuggled south into the United States. Filmmaker Adam Scorgie sets out to explain how a business this large operates while remaining entirely illegal, and he builds the case out of interviews rather than argument: growers who walk through how a grow-op is financed and hidden, police officers describing enforcement that barely dents the supply, plus criminologists, economists, doctors, and politicians weighing in on what prohibition actually accomplishes. The film traces the money from a suburban basement grow room to the border and beyond, and keeps circling back to an uncomfortable possibility its own sources raise: that the industry may be more profitable precisely because it is illegal, since prohibition inflates the price without stopping the trade. Pop culture figures show up too, a reminder of how normalized the product has become even as its production stays underground.