George Lamb sets out to test how far the law lets you go in search of a legal high, tracking the market for party pills and herbal blends sold as alternatives to banned drugs. He talks to the people manufacturing and selling these products, the users who buy them for a weekend buzz, and researchers and health workers who see what happens when the effects go wrong. The film treats the loophole itself as the story: substances designed to mimic illegal drugs closely enough to get people high, engineered just carefully enough to stay outside existing drug laws. Lamb doesn't settle for one side, letting sellers make their case for a safer, regulated alternative to street drugs while doctors and former users describe the hospital visits and bad reactions that the legal status doesn't prevent. The result sits somewhere between consumer investigation and cautionary tale, with the legality of the products never quite settling the question of whether they're safe.