In this first episode, a mysterious conspiracy letter sends us on a journey to find out just how entangled hip-hop and mass incarceration have become over the last 40 years. We travel back in time to 1980s Atlanta with Killer Mike, 1990s Oakland with Too Short and beyond. From Reagan's war on drugs to a secret NYPD dossier of the world's biggest rappers, it's all connected — and, as Killer Mike says, "The proof's in the pudding."