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

"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.