Incarcerated men in the Alabama prison system risked their safety to feed shocking footage of their horrifying living conditions to a pair of documentary filmmakers.

"The Alabama Solution," which screened at the Sundance Film Festival, is a documentary about abuses in the Alabama prison system. Though upsetting, advocacy from inmates themselves proves inspiring.

"Incarcerated men defy the odds to expose a cover-up in America's deadliest prison system," reads the logline for the HBO-backed documentary "The Alabama Solution." But that does not begin to describe this powerful and extremely necessary call-to-action.