Here we have a sure sign of progress: the psychedelic insights of the ’60s counterculture, intact and now bolstered by decades of study. Drawing on an exemplary range of interviews and visualizations, Oliver Hockenhull’s film examines the effects of ayahuasca, MDMA, LSD, and psilocybin. We learn about their mind-expanding properties, their potential to generate revelation, and their possible and documented medical uses. Why are these substances illegal? Several reasons are posited, including their dubious association with lethal drugs like cocaine and heroin and their open-patent status, which renders them unexploitable by Big Pharma—and a potential threat to the corporate world. Like the drugs themselves, Hockenhull’s film is a challenge for the mind and a treat for the senses.