Said to be the first original documentary from Oprah's OWN network, Serving Life will air next week Thursday, July 28, at 9PM ET on the cabler.

Produced by Forest Whitaker, who also narrates the film, Serving Life gives the viewer a look inside the maximum-security Louisiana State Penitentiary in Angola, LA, where the prisoners - most in jail for violent crimes like murderer and rape - volunteer to work in the prison's hospice, as part of their sentence and rehab, helping other prisoners who are suffering from life-ending sicknesses.

Specifically, the documentary "follows four inmates as they train for their new roles in a vigorous two-week orientation, teaching them how to feed, bathe and care for their peers while they're on their deathbeds."

In the video clip below, Whitaker previews the upcoming film: