"Hamilton Morris: The smell of burning methaqualone brings me back to 2013 when I sat on this very couch, in the company of a gangster, a dealer, and a few white-pipe enthusiasts. I have been fascinated by psychoactive drugs my whole life. I love to study their chemistry and impact on society, and my work has allowed me to investigate extraordinary substances around the world, yet there are still mysteries that remain. But it was here that I found myself on the scent of a trail that would lead me to one of the most astonishing drug mysteries I have ever encountered. This is the story of the South African Quaalude."