July 13, 2015 at 07:56 PM EDT

In 2001, polygamist Warren Jeffs was sentenced in a Texas court to life in prison plus 20 years for sexually assaulting two women he said were his “spiritual wives.” A new documentary called Prophet’s Prey details the story of Jeffs, a former president of Mormon fundamentalist denomination The Fundamentalist Church of Jesus Christ of Latter-Day Saints, and, according to the official synopsis, examines how he “bridged the gap between sister wives and ecclesiastically-justified rape.”

Prophet’s Prey is directed by Oscar-nominated documentarian Amy Berg (Deliver Us From Evil, West of Memphis) and is narrated by Nick Cave, who also wrote the score with longtime collaborator Warren Ellis. This Showtime Original doc opens in New York on Sept. 18 and in L.A on Sept. 25 and premieres on Showtime this fall.

You can exclusively see the trailer for Prophet’s Prey above.

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